Replaces hard-coded placeholder string with translatable messages

src/main/java/net/knarcraft/bookswithoutborders/BooksWithoutBorders.java

@@ -33,6 +33,7 @@ import net.knarcraft.bookswithoutborders.config.translation.BookshelfMessage;
 import net.knarcraft.bookswithoutborders.config.translation.CostMessage;
 import net.knarcraft.bookswithoutborders.config.translation.Formatting;
 import net.knarcraft.bookswithoutborders.config.translation.GiveMessage;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.config.translation.SaveMessage;
 import net.knarcraft.bookswithoutborders.config.translation.SignText;
 import net.knarcraft.bookswithoutborders.config.translation.Translatable;
@@ -212,6 +213,7 @@ public class BooksWithoutBorders extends JavaPlugin {
         translator.registerMessageCategory(CostMessage.SUCCESS_COST_ITEM_SET);
         translator.registerMessageCategory(SaveMessage.SUCCESS_SAVED);
         translator.registerMessageCategory(SignText.SIGN_HEADER);
+        translator.registerMessageCategory(Placeholder.AUTHOR);
 
         StringFormatter stringFormatter = new StringFormatter(this.getDescription().getName(), translator);
         stringFormatter.setColorConversion(ColorConversion.RGB);
@@ -303,7 +305,7 @@ public class BooksWithoutBorders extends JavaPlugin {
             pluginCommand.setExecutor(executor);
         } else {
             getLogger().log(Level.SEVERE, new FormatBuilder(StaticMessage.EXCEPTION_COMMAND_REGISTRATION_FAILED.toString()).
-                    replace("{command}", commandName).toString());
+                    replace(Placeholder.COMMAND, commandName).toString());
         }
     }
 

src/main/java/net/knarcraft/bookswithoutborders/command/CommandAddTitlePage.java

@@ -2,6 +2,7 @@ package net.knarcraft.bookswithoutborders.command;
 
 import net.knarcraft.bookswithoutborders.BooksWithoutBorders;
 import net.knarcraft.bookswithoutborders.config.translation.Formatting;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.config.translation.Translatable;
 import net.knarcraft.bookswithoutborders.utility.BookMetaUtil;
 import net.knarcraft.bookswithoutborders.utility.InputCleaningUtil;
@@ -44,8 +45,7 @@ public class CommandAddTitlePage implements TabExecutor {
         int index;
         if (arguments.length < 1) {
             if (InventoryUtil.notHoldingOneWrittenBookCheck(player,
-                    new FormatBuilder(Translatable.ERROR_NOT_HOLDING_WRITTEN_BOOK).replace("{action}", Translatable.ACTION_ADD_TITLE_AUTHOR_PAGE),
+                    Translatable.ACTION_ADD_TITLE_AUTHOR_PAGE)) {
-                    new FormatBuilder(Translatable.ERROR_ONLY_ONE_BOOK).replace("{action}", Translatable.ACTION_ADD_TITLE_AUTHOR_PAGE))) {
                 return true;
             }
 
@@ -99,9 +99,9 @@ public class CommandAddTitlePage implements TabExecutor {
             // Add a page with the book title and book author
             String loreSeparator = BooksWithoutBorders.getConfiguration().getLoreSeparator();
             String pageText = formatTitle(new FormatBuilder(Formatting.NEUTRAL_TITLE_PAGE_TITLE_AUTHOR_FORMAT).
-                    replace("{title}", InputCleaningUtil.stripColor(BookMetaUtil.getBookTitle(bookMeta))).
+                    replace(Placeholder.TITLE, InputCleaningUtil.stripColor(BookMetaUtil.getBookTitle(bookMeta))).
-                    replace("{separator}", loreSeparator).
+                    replace(Placeholder.SEPARATOR, loreSeparator).
-                    replace("{author}", InputCleaningUtil.stripColor(BookMetaUtil.getBookAuthor(bookMeta, null))).toString());
+                    replace(Placeholder.AUTHOR, InputCleaningUtil.stripColor(BookMetaUtil.getBookAuthor(bookMeta, null))).toString());
 
             if (index > pages.size()) {
                 pages.add(pageText);
@@ -138,13 +138,13 @@ public class CommandAddTitlePage implements TabExecutor {
         String loreSeparator = BooksWithoutBorders.getConfiguration().getLoreSeparator();
         if (input.contains(loreSeparator)) {
             String[] parts = input.split(loreSeparator);
-            FormatBuilder builder = new FormatBuilder(Formatting.NEUTRAL_TITLE_PAGE_HEADER_FORMAT).replace("{header}", parts[0]);
+            FormatBuilder builder = new FormatBuilder(Formatting.NEUTRAL_TITLE_PAGE_HEADER_FORMAT).replace(Placeholder.HEADER, parts[0]);
             for (int i = 1; i < parts.length; i++) {
-                builder.append(Formatting.NEUTRAL_TITLE_PAGE_TEXT_FORMAT).replace("{text}", parts[i]);
+                builder.append(Formatting.NEUTRAL_TITLE_PAGE_TEXT_FORMAT).replace(Placeholder.TEXT, parts[i]);
             }
             return builder.color().toString();
         } else {
-            return new FormatBuilder(Formatting.NEUTRAL_TITLE_PAGE_HEADER_FORMAT).replace("{header}", input).color().toString();
+            return new FormatBuilder(Formatting.NEUTRAL_TITLE_PAGE_HEADER_FORMAT).replace(Placeholder.HEADER, input).color().toString();
         }
     }
 

src/main/java/net/knarcraft/bookswithoutborders/command/CommandBooksWithoutBorders.java

@@ -7,6 +7,7 @@ import net.knarcraft.bookswithoutborders.config.Permission;
 import net.knarcraft.bookswithoutborders.config.StaticMessage;
 import net.knarcraft.bookswithoutborders.config.translation.CostMessage;
 import net.knarcraft.bookswithoutborders.config.translation.Formatting;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.config.translation.Translatable;
 import net.knarcraft.bookswithoutborders.manager.EconomyManager;
 import net.knarcraft.knarlib.formatting.FormatBuilder;
@@ -49,8 +50,8 @@ public class CommandBooksWithoutBorders implements TabExecutor {
             commands = getCommands(sender);
             commandExplanation = getCommandExplanation(true);
         }
-        new FormatBuilder(Formatting.NEUTRAL_COMMANDS_HEADER).replace("{bookPrice}", getBookPrice()).
+        new FormatBuilder(Formatting.NEUTRAL_COMMANDS_HEADER).replace(Placeholder.BOOK_PRICE, getBookPrice()).
-                replace("{commands}", commands).replace("{commandExplanation}", commandExplanation).
+                replace(Placeholder.COMMANDS, commands).replace(Placeholder.COMMAND_EXPLANATION, commandExplanation).
                 success(sender);
         return true;
     }
@@ -86,14 +87,14 @@ public class CommandBooksWithoutBorders implements TabExecutor {
         Material bookPriceType = config.getBookPriceType();
         double bookPriceQuantity = config.getBookPriceQuantity();
         if (bookPriceType != Material.AIR) {
-            return new FormatBuilder(Formatting.NEUTRAL_COMMANDS_BOOK_PRICE_ITEM).replace("{quantity}",
+            return new FormatBuilder(Formatting.NEUTRAL_COMMANDS_BOOK_PRICE_ITEM).replace(Placeholder.QUANTITY,
-                    String.valueOf((int) bookPriceQuantity)).replace("{type}", bookPriceType.toString()).toString();
+                    String.valueOf((int) bookPriceQuantity)).replace(Placeholder.TYPE, bookPriceType.toString()).toString();
         } else {
             EconomyManager economyManager = BooksWithoutBorders.getConfiguration().getEconomyManager();
             if (economyManager.getEconomy() == null) {
                 return new FormatBuilder(CostMessage.ERROR_VAULT_COST_BUT_UNAVAILABLE) + "\n";
             } else {
-                return new FormatBuilder(Formatting.NEUTRAL_COMMANDS_BOOK_PRICE_ECO).replace("{price}",
+                return new FormatBuilder(Formatting.NEUTRAL_COMMANDS_BOOK_PRICE_ECO).replace(Placeholder.COST,
                         economyManager.getEconomy().format(bookPriceQuantity)).toString();
             }
         }
@@ -141,7 +142,7 @@ public class CommandBooksWithoutBorders implements TabExecutor {
         PluginCommand pluginCommand = BooksWithoutBorders.getInstance().getCommand(bwBCommand.toString());
         if (pluginCommand == null) {
             BooksWithoutBorders.log(Level.SEVERE, new FormatBuilder(StaticMessage.EXCEPTION_COMMAND_NOT_REGISTERED.toString()).
-                    replace("{command}", bwBCommand.toString()).toString());
+                    replace(Placeholder.COMMAND, bwBCommand.toString()).toString());
             return "";
         }
 
@@ -161,18 +162,18 @@ public class CommandBooksWithoutBorders implements TabExecutor {
         } else {
             commandUsage = pluginCommand.getUsage().replace("<command>", pluginCommand.getName());
             description = pluginCommand.getDescription();
-            aliases = new FormatBuilder(Formatting.NEUTRAL_COMMANDS_ALIASES).replace("{aliases}",
+            aliases = new FormatBuilder(Formatting.NEUTRAL_COMMANDS_ALIASES).replace(Placeholder.ALIASES,
                     String.join(",", pluginCommand.getAliases())).toString();
         }
 
-        String commandDescription = new FormatBuilder(Formatting.NEUTRAL_COMMANDS_COMMAND).replace("{usage}",
+        String commandDescription = new FormatBuilder(Formatting.NEUTRAL_COMMANDS_COMMAND).replace(Placeholder.USAGE,
-                commandUsage).replace("{description}", description).replace("{aliases}", aliases).toString();
+                commandUsage).replace(Placeholder.DESCRIPTION, description).replace(Placeholder.ALIASES, aliases).toString();
 
         if (!summary && sender.hasPermission(Permission.ADMIN.toString())) {
             if (permission == null) {
                 permission = new FormatBuilder(Formatting.NEUTRAL_COMMANDS_COMMAND_NO_PERMISSION_REQUIRED).toString();
             }
-            commandDescription += new FormatBuilder(Formatting.NEUTRAL_COMMANDS_COMMAND_PERMISSION).replace("{permission}", permission).toString();
+            commandDescription += new FormatBuilder(Formatting.NEUTRAL_COMMANDS_COMMAND_PERMISSION).replace(Placeholder.PERMISSION, permission).toString();
         }
         return commandDescription;
     }

src/main/java/net/knarcraft/bookswithoutborders/command/CommandClear.java

@@ -30,9 +30,7 @@ public class CommandClear implements TabExecutor {
             return false;
         }
 
-        if (InventoryUtil.notHoldingOneWritableBookCheck(player,
+        if (InventoryUtil.notHoldingOneWritableBookCheck(player, Translatable.ACTION_CLEAR)) {
-                new FormatBuilder(Translatable.ERROR_NOT_HOLDING_WRITABLE_BOOK).replace("{action}", Translatable.ACTION_CLEAR),
-                new FormatBuilder(Translatable.ERROR_ONLY_ONE_BOOK).replace("{action}", Translatable.ACTION_CLEAR))) {
             return false;
         }
 

src/main/java/net/knarcraft/bookswithoutborders/command/CommandCopy.java

@@ -36,8 +36,7 @@ public class CommandCopy implements TabExecutor {
         }
 
         if (InventoryUtil.notHoldingOneWrittenBookCheck(player,
-                new FormatBuilder(Translatable.ERROR_NOT_HOLDING_WRITTEN_BOOK).replace("{action}", Translatable.ACTION_COPY),
+                Translatable.ACTION_COPY)) {
-                new FormatBuilder(Translatable.ERROR_ONLY_ONE_BOOK).replace("{action}", Translatable.ACTION_COPY))) {
             return false;
         }
 

src/main/java/net/knarcraft/bookswithoutborders/command/CommandDecrypt.java

@@ -34,8 +34,7 @@ public class CommandDecrypt implements TabExecutor {
         }
 
         if (InventoryUtil.notHoldingOneWrittenBookCheck(player,
-                new FormatBuilder(Translatable.ERROR_NOT_HOLDING_WRITTEN_BOOK).replace("{action}", Translatable.ACTION_DECRYPT),
+                Translatable.ACTION_DECRYPT)) {
-                new FormatBuilder(Translatable.ERROR_ONLY_ONE_BOOK).replace("{action}", Translatable.ACTION_DECRYPT))) {
             return false;
         }
 

src/main/java/net/knarcraft/bookswithoutborders/command/CommandDelete.java

@@ -1,6 +1,7 @@
 package net.knarcraft.bookswithoutborders.command;
 
 import net.knarcraft.bookswithoutborders.BooksWithoutBorders;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.config.translation.Translatable;
 import net.knarcraft.bookswithoutborders.gui.PagedBookIndex;
 import net.knarcraft.bookswithoutborders.state.BookDirectory;
@@ -92,7 +93,7 @@ public class CommandDelete implements TabExecutor {
         //Try to delete the file
         try {
             if (file.delete()) {
-                new FormatBuilder(Translatable.SUCCESS_DELETED).replace("{file}", fileName).success(sender);
+                new FormatBuilder(Translatable.SUCCESS_DELETED).replace(Placeholder.FILE, fileName).success(sender);
             } else {
                 new FormatBuilder(Translatable.ERROR_DELETE_FAILED_SILENT).error(sender);
             }

src/main/java/net/knarcraft/bookswithoutborders/command/CommandEncrypt.java

@@ -69,8 +69,7 @@ public class CommandEncrypt implements TabExecutor {
         }
 
         if (InventoryUtil.notHoldingOneWrittenBookCheck(player,
-                new FormatBuilder(Translatable.ERROR_NOT_HOLDING_WRITTEN_BOOK).replace("{action}", Translatable.ACTION_ENCRYPT),
+                Translatable.ACTION_ENCRYPT)) {
-                new FormatBuilder(Translatable.ERROR_ONLY_ONE_BOOK).replace("{action}", Translatable.ACTION_ENCRYPT))) {
             return null;
         }
 

src/main/java/net/knarcraft/bookswithoutborders/command/CommandMigrate.java

@@ -2,6 +2,7 @@ package net.knarcraft.bookswithoutborders.command;
 
 import net.knarcraft.bookswithoutborders.BooksWithoutBorders;
 import net.knarcraft.bookswithoutborders.config.StaticMessage;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.config.translation.Translatable;
 import net.knarcraft.bookswithoutborders.container.MigrationRequest;
 import net.knarcraft.bookswithoutborders.thread.MigrationQueueThread;
@@ -62,7 +63,7 @@ public class CommandMigrate implements TabExecutor {
         File[] files = folder.listFiles();
         if (files == null) {
             BooksWithoutBorders.log(Level.WARNING, new FormatBuilder(StaticMessage.EXCEPTION_DIRECTORY_UNAVAILABLE.toString()).
-                    replace("{folder}", folder.getName()).toString());
+                    replace(Placeholder.FOLDER, folder.getName()).toString());
             return;
         }
         for (File file : files) {

src/main/java/net/knarcraft/bookswithoutborders/command/CommandSave.java

@@ -5,6 +5,7 @@ import net.knarcraft.bookswithoutborders.config.BwBConfig;
 import net.knarcraft.bookswithoutborders.config.Permission;
 import net.knarcraft.bookswithoutborders.config.StaticMessage;
 import net.knarcraft.bookswithoutborders.config.translation.Formatting;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.config.translation.SaveMessage;
 import net.knarcraft.bookswithoutborders.config.translation.Translatable;
 import net.knarcraft.bookswithoutborders.state.BookDirectory;
@@ -125,7 +126,7 @@ public class CommandSave implements TabExecutor {
 
             //Update the relevant book list
             BooksWithoutBorders.updateBooks(player, saveToPublicFolder);
-            new FormatBuilder(SaveMessage.SUCCESS_SAVED).replace("{fileName}", newName).success(player);
+            new FormatBuilder(SaveMessage.SUCCESS_SAVED).replace(Placeholder.FILE, newName).success(player);
         } catch (IOException exception) {
             BooksWithoutBorders.log(Level.SEVERE, StaticMessage.EXCEPTION_SAVE_BOOK_FAILED.toString());
         }
@@ -178,14 +179,14 @@ public class CommandSave implements TabExecutor {
         // Skip duplicate unnamed book saving
         if (!isUnnamed && !overwrite) {
             new FormatBuilder(SaveMessage.ERROR_SAVE_DUPLICATE_NAMED).error(player);
-            new FormatBuilder(SaveMessage.ERROR_SAVE_OVERWRITE_REQUIRED).replace("{command}", fullCommand).error(player);
+            new FormatBuilder(SaveMessage.ERROR_SAVE_OVERWRITE_REQUIRED).replace(Placeholder.COMMAND, fullCommand).error(player);
             return null;
         }
 
         // Skip if duplicate limit is reached
         if (foundDuplicates > duplicateLimit) {
-            new FormatBuilder(SaveMessage.ERROR_SAVE_DUPLICATE_UNNAMED).replace("{fileName}", fileName).error(player);
+            new FormatBuilder(SaveMessage.ERROR_SAVE_DUPLICATE_UNNAMED).replace(Placeholder.FILE, fileName).error(player);
-            new FormatBuilder(SaveMessage.ERROR_SAVE_OVERWRITE_REQUIRED).replace("{command}", fullCommand).error(player);
+            new FormatBuilder(SaveMessage.ERROR_SAVE_OVERWRITE_REQUIRED).replace(Placeholder.COMMAND, fullCommand).error(player);
             return null;
         }
 

src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetAuthor.java

@@ -1,5 +1,6 @@
 package net.knarcraft.bookswithoutborders.command;
 
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.config.translation.Translatable;
 import net.knarcraft.bookswithoutborders.state.ItemSlot;
 import net.knarcraft.bookswithoutborders.utility.InventoryUtil;
@@ -38,8 +39,7 @@ public class CommandSetAuthor implements TabExecutor {
         }
 
         if (InventoryUtil.notHoldingOneWrittenBookCheck(player,
-                new FormatBuilder(Translatable.ERROR_NOT_HOLDING_WRITTEN_BOOK).replace("{action}", Translatable.ACTION_SET_AUTHOR),
+                Translatable.ACTION_SET_AUTHOR)) {
-                new FormatBuilder(Translatable.ERROR_ONLY_ONE_BOOK).replace("{action}", Translatable.ACTION_SET_AUTHOR))) {
             return false;
         }
 
@@ -54,7 +54,7 @@ public class CommandSetAuthor implements TabExecutor {
         String author = ColorHelper.translateColorCodes(String.join(" ", arguments), ColorConversion.RGB);
         bookMetaData.setAuthor(author);
         heldBook.setItemMeta(bookMetaData);
-        new FormatBuilder(Translatable.SUCCESS_SET_AUTHOR).replace("{author}", author).success(player);
+        new FormatBuilder(Translatable.SUCCESS_SET_AUTHOR).replace(Placeholder.AUTHOR, author).success(player);
         return true;
     }
 

src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetBookPrice.java

@@ -5,6 +5,7 @@ import net.knarcraft.bookswithoutborders.config.BwBConfig;
 import net.knarcraft.bookswithoutborders.config.ConfigOption;
 import net.knarcraft.bookswithoutborders.config.StaticMessage;
 import net.knarcraft.bookswithoutborders.config.translation.CostMessage;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.config.translation.Translatable;
 import net.knarcraft.bookswithoutborders.manager.EconomyManager;
 import net.knarcraft.bookswithoutborders.state.ItemSlot;
@@ -112,8 +113,8 @@ public class CommandSetBookPrice implements TabExecutor {
         booksWithoutBorders.getConfig().set(ConfigOption.PRICE_QUANTITY.getConfigNode(), newPriceQuantity);
         booksWithoutBorders.saveConfig();
 
-        new FormatBuilder(CostMessage.SUCCESS_COST_ITEM_SET).replace("{quantity}",
+        new FormatBuilder(CostMessage.SUCCESS_COST_ITEM_SET).replace(Placeholder.QUANTITY,
-                String.valueOf((int) newPriceQuantity)).replace("{price}", newPriceType).success(sender);
+                String.valueOf((int) newPriceQuantity)).replace(Placeholder.COST, newPriceType).success(sender);
         return true;
     }
 
@@ -135,7 +136,7 @@ public class CommandSetBookPrice implements TabExecutor {
             booksWithoutBorders.getConfig().set(ConfigOption.PRICE_QUANTITY.getConfigNode(), newPriceQuantity);
             booksWithoutBorders.saveConfig();
 
-            new FormatBuilder(CostMessage.SUCCESS_COST_ECONOMY_SET).replace("{cost}",
+            new FormatBuilder(CostMessage.SUCCESS_COST_ECONOMY_SET).replace(Placeholder.COST,
                     economyManager.getEconomy().format(newPriceQuantity)).success(sender);
             return true;
         } else {

src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetGeneration.java

@@ -29,8 +29,7 @@ public class CommandSetGeneration implements TabExecutor {
         }
 
         if (InventoryUtil.notHoldingOneWrittenBookCheck(player,
-                new FormatBuilder(Translatable.ERROR_NOT_HOLDING_WRITTEN_BOOK).replace("{action}", Translatable.ACTION_CHANGE_GENERATION),
+                Translatable.ACTION_CHANGE_GENERATION)) {
-                new FormatBuilder(Translatable.ERROR_ONLY_ONE_BOOK).replace("{action}", Translatable.ACTION_CHANGE_GENERATION))) {
             return false;
         }
 

src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetTitle.java

@@ -1,5 +1,6 @@
 package net.knarcraft.bookswithoutborders.command;
 
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.config.translation.Translatable;
 import net.knarcraft.bookswithoutborders.state.ItemSlot;
 import net.knarcraft.bookswithoutborders.utility.InputParsingUtil;
@@ -77,9 +78,9 @@ public class CommandSetTitle implements TabExecutor {
         heldItem.setItemMeta(newMetaData);
 
         if (heldItem.getType() == Material.WRITTEN_BOOK && !setDisplayName) {
-            new FormatBuilder(Translatable.SUCCESS_TITLE_SET).replace("{title}", title).success(player);
+            new FormatBuilder(Translatable.SUCCESS_TITLE_SET).replace(Placeholder.TITLE, title).success(player);
         } else {
-            new FormatBuilder(Translatable.SUCCESS_DISPLAY_NAME_SET).replace("{displayName}", title).success(player);
+            new FormatBuilder(Translatable.SUCCESS_DISPLAY_NAME_SET).replace(Placeholder.DISPLAY_NAME, title).success(player);
         }
         return true;
     }

src/main/java/net/knarcraft/bookswithoutborders/command/CommandUnSign.java

@@ -34,8 +34,7 @@ public class CommandUnSign implements TabExecutor {
         }
 
         if (InventoryUtil.notHoldingOneWrittenBookCheck(player,
-                new FormatBuilder(Translatable.ERROR_NOT_HOLDING_WRITTEN_BOOK).replace("{action}", Translatable.ACTION_UNSIGN),
+                Translatable.ACTION_UNSIGN)) {
-                new FormatBuilder(Translatable.ERROR_ONLY_ONE_BOOK).replace("{action}", Translatable.ACTION_UNSIGN))) {
             return false;
         }
 

src/main/java/net/knarcraft/bookswithoutborders/config/translation/Placeholder.java

@@ -0,0 +1,54 @@
+package net.knarcraft.bookswithoutborders.config.translation;
+
+import net.knarcraft.knarlib.formatting.TranslatableMessage;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Placeholders used in other translatable messages
+ */
+public enum Placeholder implements TranslatableMessage {
+
+    FILE,
+    AUTHOR,
+    ACTION,
+    DATA,
+    INDEX,
+    QUANTITY,
+    COST,
+    TITLE,
+    DISPLAY_NAME,
+    LINE,
+    PASSWORD,
+    COMMAND,
+    EXCEPTION,
+    PATH,
+    EXTENSION,
+    HEADER,
+    TEXT,
+    SEPARATOR,
+    CURRENT,
+    TOTAL,
+    CHARACTER,
+    PAGE,
+    BOOK_PRICE,
+    COMMANDS,
+    COMMAND_EXPLANATION,
+    PLAYER,
+    CURRENCY,
+    FOLDER,
+    TYPE,
+    PERMISSION,
+    USAGE,
+    DESCRIPTION,
+    ALIASES,
+    LORE,
+    COPIES,
+    BALANCE,
+    ;
+
+    @Override
+    public @NotNull TranslatableMessage[] getAllMessages() {
+        return Placeholder.values();
+    }
+
+}

src/main/java/net/knarcraft/bookswithoutborders/gui/AuthorBookIndex.java

@@ -2,6 +2,7 @@ package net.knarcraft.bookswithoutborders.gui;
 
 import net.knarcraft.bookswithoutborders.BooksWithoutBorders;
 import net.knarcraft.bookswithoutborders.config.translation.Formatting;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.utility.BookFileUtil;
 import net.knarcraft.bookswithoutborders.utility.InputCleaningUtil;
 import net.knarcraft.knarlib.formatting.FormatBuilder;
@@ -60,7 +61,7 @@ public class AuthorBookIndex extends BookIndex {
         String navigationCommand = command + " author" + authorName;
 
         TranslatableMessage message = listPublic ? Formatting.NEUTRAL_AUTHOR_PUBLIC_BOOKS_HEADER : Formatting.NEUTRAL_AUTHOR_PLAYER_BOOKS_HEADER;
-        componentBuilder.append(new FormatBuilder(message).replace("{author}", authorName).color().toString());
+        componentBuilder.append(new FormatBuilder(message).replace(Placeholder.AUTHOR, authorName).color().toString());
 
 
         displayBookList(componentBuilder, command, page, availableBooks);

src/main/java/net/knarcraft/bookswithoutborders/gui/BookIndex.java

@@ -1,6 +1,7 @@
 package net.knarcraft.bookswithoutborders.gui;
 
 import net.knarcraft.bookswithoutborders.config.translation.Formatting;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.utility.InputParsingUtil;
 import net.knarcraft.knarlib.formatting.FormatBuilder;
 import net.md_5.bungee.api.ChatColor;
@@ -83,8 +84,8 @@ public abstract class BookIndex {
      */
     protected static void displayTotalPages(@NotNull ComponentBuilder componentBuilder, @NotNull String command,
                                             int page, int totalPages) {
-        String pageDisplay = new FormatBuilder(Formatting.NEUTRAL_BOOK_LIST_TOTAL_PAGES).replace("{current}",
+        String pageDisplay = new FormatBuilder(Formatting.NEUTRAL_BOOK_LIST_TOTAL_PAGES).replace(Placeholder.CURRENT,
-                String.valueOf(page)).replace("{total}", String.valueOf(totalPages)).color().toString();
+                String.valueOf(page)).replace(Placeholder.TOTAL, String.valueOf(totalPages)).color().toString();
         componentBuilder.append(pageDisplay,
                 ComponentBuilder.FormatRetention.NONE).color(interactColor).event(new HoverEvent(
                 HoverEvent.Action.SHOW_TEXT, new Text("/" + command + " page" + page))).event(
@@ -106,7 +107,7 @@ public abstract class BookIndex {
             if (firstInstances.containsKey(character)) {
                 int pageIndex = (firstInstances.get(character) / booksPerPage) + 1;
                 HoverEvent hoverEvent = new HoverEvent(HoverEvent.Action.SHOW_TEXT, new Text(
-                        new FormatBuilder(Formatting.NEUTRAL_BOOK_LIST_INDEX_HOVER).replace("{character}", "" + character).color().toString()));
+                        new FormatBuilder(Formatting.NEUTRAL_BOOK_LIST_INDEX_HOVER).replace(Placeholder.CHARACTER, "" + character).color().toString()));
                 ClickEvent clickEvent = new ClickEvent(ClickEvent.Action.RUN_COMMAND,
                         "/" + command + " page" + pageIndex);
 
@@ -131,7 +132,7 @@ public abstract class BookIndex {
         if (page > 1) {
             String fullCommand = "/" + command + " page" + (page - 1);
             HoverEvent prevPagePreview = new HoverEvent(HoverEvent.Action.SHOW_TEXT, new Text(
-                    new FormatBuilder(Formatting.NEUTRAL_BOOK_LIST_TO_PAGE).replace("{page}", String.valueOf(page - 1)).color().toString()));
+                    new FormatBuilder(Formatting.NEUTRAL_BOOK_LIST_TO_PAGE).replace(Placeholder.PAGE, String.valueOf(page - 1)).color().toString()));
             ClickEvent prevPageClick = new ClickEvent(ClickEvent.Action.RUN_COMMAND, fullCommand);
             componentBuilder.append(previousPage, ComponentBuilder.FormatRetention.NONE).color(interactColor).
                     event(prevPagePreview).event(prevPageClick);
@@ -154,7 +155,7 @@ public abstract class BookIndex {
         if (page < totalPages) {
             String fullCommand = "/" + command + " page" + (page + 1);
             HoverEvent nextPagePreview = new HoverEvent(HoverEvent.Action.SHOW_TEXT, new Text(
-                    new FormatBuilder(Formatting.NEUTRAL_BOOK_LIST_TO_PAGE).replace("{page}", String.valueOf(page + 1)).color().toString()));
+                    new FormatBuilder(Formatting.NEUTRAL_BOOK_LIST_TO_PAGE).replace(Placeholder.PAGE, String.valueOf(page + 1)).color().toString()));
             ClickEvent nextPageClick = new ClickEvent(ClickEvent.Action.RUN_COMMAND, fullCommand);
             componentBuilder.append(nextPage, ComponentBuilder.FormatRetention.NONE).color(interactColor)
                     .event(nextPagePreview).event(nextPageClick);

src/main/java/net/knarcraft/bookswithoutborders/gui/PagedBookIndex.java

@@ -2,6 +2,7 @@ package net.knarcraft.bookswithoutborders.gui;
 
 import net.knarcraft.bookswithoutborders.BooksWithoutBorders;
 import net.knarcraft.bookswithoutborders.config.translation.Formatting;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.utility.BookFileUtil;
 import net.knarcraft.bookswithoutborders.utility.InputCleaningUtil;
 import net.knarcraft.knarlib.formatting.FormatBuilder;
@@ -103,9 +104,9 @@ public class PagedBookIndex extends BookIndex {
             HoverEvent pathHover = new HoverEvent(HoverEvent.Action.SHOW_TEXT, new Text(new FormatBuilder(Formatting.NEUTRAL_BOOK_LIST_PATH_HOVER).color().toString()));
             ClickEvent authorClick = new ClickEvent(ClickEvent.Action.RUN_COMMAND, "/" + command + " author" + InputCleaningUtil.stripColor(author) + " page1");
             HoverEvent authorHover = new HoverEvent(HoverEvent.Action.SHOW_TEXT,
-                    new Text(new FormatBuilder(Formatting.NEUTRAL_BOOK_LIST_AUTHOR_HOVER).replace("{author}", InputCleaningUtil.stripColor(author)).color().toString()));
+                    new Text(new FormatBuilder(Formatting.NEUTRAL_BOOK_LIST_AUTHOR_HOVER).replace(Placeholder.AUTHOR, InputCleaningUtil.stripColor(author)).color().toString()));
 
-            componentBuilder.append(new FormatBuilder(Formatting.NEUTRAL_BOOK_LIST_BOOK_INDEX_NUMBER).replace("{index}",
+            componentBuilder.append(new FormatBuilder(Formatting.NEUTRAL_BOOK_LIST_BOOK_INDEX_NUMBER).replace(Placeholder.INDEX,
                     String.valueOf(bookIndex + 1)).color().toString()).color(interactColor).event(indexClick).event(indexHover);
             componentBuilder.append(" ", ComponentBuilder.FormatRetention.NONE);
             componentBuilder.append(title).color(ChatColor.WHITE).event(pathClick).event(pathHover);

src/main/java/net/knarcraft/bookswithoutborders/listener/BookshelfListener.java

@@ -3,6 +3,7 @@ package net.knarcraft.bookswithoutborders.listener;
 import net.knarcraft.bookswithoutborders.BooksWithoutBorders;
 import net.knarcraft.bookswithoutborders.config.Permission;
 import net.knarcraft.bookswithoutborders.config.translation.Formatting;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.container.Bookshelf;
 import net.knarcraft.bookswithoutborders.handler.BookshelfHandler;
 import net.knarcraft.bookswithoutborders.utility.BookMetaUtil;
@@ -94,13 +95,13 @@ public class BookshelfListener implements Listener {
         if (bookshelf != null) {
             title = bookshelf.getTitle();
             for (String loreLine : bookshelf.getLore()) {
-                lore.append(new FormatBuilder(Formatting.NEUTRAL_BOOKSHELF_HEADER_LORE).replace("{lore}", loreLine));
+                lore.append(new FormatBuilder(Formatting.NEUTRAL_BOOKSHELF_HEADER_LORE).replace(Placeholder.LORE, loreLine));
             }
         } else {
             title = new FormatBuilder(Formatting.NEUTRAL_BOOKSHELF_HEADER_TITLE_EMPTY).toString();
         }
-        builder.append(new FormatBuilder(Formatting.NEUTRAL_BOOKSHELF_HEADER_TITLE).replace("{name}", title).
+        builder.append(new FormatBuilder(Formatting.NEUTRAL_BOOKSHELF_HEADER_TITLE).replace(Placeholder.TITLE, title).
-                replace("{lore}", lore.toString()));
+                replace(Placeholder.LORE, lore.toString()));
 
         for (int i = 0; i < bookshelfInventory.getSize(); i++) {
             appendBookshelfItem(i, builder, bookshelfInventory);
@@ -125,7 +126,7 @@ public class BookshelfListener implements Listener {
             builder.append(new FormatBuilder(Formatting.NEUTRAL_BOOKSHELF_HEADER_BOTTOM));
         }
 
-        builder.append(new FormatBuilder(Formatting.NEUTRAL_BOOKSHELF_ENTRY_INDEX).replace("{index}", String.valueOf(index)));
+        builder.append(new FormatBuilder(Formatting.NEUTRAL_BOOKSHELF_ENTRY_INDEX).replace(Placeholder.INDEX, String.valueOf(index)));
 
         ItemStack itemStack = bookshelfInventory.getItem(counter);
         if (itemStack == null) {
@@ -168,8 +169,8 @@ public class BookshelfListener implements Listener {
     private String getBookDescription(@NotNull BookMeta bookMeta) {
         String title = BookMetaUtil.getBookTitle(bookMeta);
         String author = BookMetaUtil.getBookAuthor(bookMeta, null);
-        return new FormatBuilder(Formatting.NEUTRAL_BOOKSHELF_WRITTEN_FORMAT).replace("{title}", title).
+        return new FormatBuilder(Formatting.NEUTRAL_BOOKSHELF_WRITTEN_FORMAT).replace(Placeholder.TITLE, title).
-                replace("{author}", author).toString();
+                replace(Placeholder.AUTHOR, author).toString();
     }
 
     /**

src/main/java/net/knarcraft/bookswithoutborders/listener/PlayerEventListener.java

@@ -3,6 +3,7 @@ package net.knarcraft.bookswithoutborders.listener;
 import net.knarcraft.bookswithoutborders.BooksWithoutBorders;
 import net.knarcraft.bookswithoutborders.config.BwBConfig;
 import net.knarcraft.bookswithoutborders.config.StaticMessage;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.state.BookDirectory;
 import net.knarcraft.bookswithoutborders.utility.BookLoaderUtil;
 import net.knarcraft.bookswithoutborders.utility.InputCleaningUtil;
@@ -35,7 +36,7 @@ public class PlayerEventListener implements Listener {
         if (file.exists() && !file.renameTo(new File(bookFolder, player.getUniqueId().toString()))) {
             BooksWithoutBorders.log(Level.WARNING, new FormatBuilder(
                     StaticMessage.WARNING_USER_BOOK_MIGRATION_IMPOSSIBLE.toString()).
-                    replace("{player}", player.getName()).toString());
+                    replace(Placeholder.PLAYER, player.getName()).toString());
         }
 
         //Handle new players

src/main/java/net/knarcraft/bookswithoutborders/listener/SignEventListener.java

@@ -3,6 +3,7 @@ package net.knarcraft.bookswithoutborders.listener;
 import net.knarcraft.bookswithoutborders.BooksWithoutBorders;
 import net.knarcraft.bookswithoutborders.config.Permission;
 import net.knarcraft.bookswithoutborders.config.translation.GiveMessage;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.config.translation.SignText;
 import net.knarcraft.bookswithoutborders.config.translation.Translatable;
 import net.knarcraft.bookswithoutborders.encryption.EncryptionStyle;
@@ -62,13 +63,13 @@ public class SignEventListener implements Listener {
         SignType type = SignType.fromString(lines[1]);
         if (type == null || lines[2].trim().isEmpty()) {
             //Mark the second line as invalid
-            event.setLine(1, new FormatBuilder(SignText.SIGN_INVALID).replace("{line}", lines[1]).color().toString());
+            event.setLine(1, new FormatBuilder(SignText.SIGN_INVALID).replace(Placeholder.LINE, lines[1]).color().toString());
             new FormatBuilder(SignText.ERROR_SIGN_INVALID).error(player);
             return;
         }
 
         //Mark the second line as valid
-        event.setLine(1, new FormatBuilder(SignText.SIGN_VALID).replace("{line}", lines[1]).color().toString());
+        event.setLine(1, new FormatBuilder(SignText.SIGN_VALID).replace(Placeholder.LINE, lines[1]).color().toString());
         lines = event.getLines();
 
         //Mark valid encryption/decryption sign
@@ -76,8 +77,8 @@ public class SignEventListener implements Listener {
             //Generate book giving sign
             generateGiveSign(event, lines, player);
         } else {
-            event.setLine(2, new FormatBuilder(SignText.SIGN_PASSWORD).replace("{password}", lines[2]).color().toString());
+            event.setLine(2, new FormatBuilder(SignText.SIGN_PASSWORD).replace(Placeholder.PASSWORD, lines[2]).color().toString());
-            event.setLine(3, new FormatBuilder(SignText.SIGN_VALID).replace("{line}", lines[3]).color().toString());
+            event.setLine(3, new FormatBuilder(SignText.SIGN_VALID).replace(Placeholder.LINE, lines[3]).color().toString());
         }
     }
 
@@ -132,8 +133,8 @@ public class SignEventListener implements Listener {
             giveBook(sign, player);
         } else {
             SignSide front = sign.getSide(Side.FRONT);
-            new FormatBuilder(SignText.ERROR_SIGN_COMMAND_INVALID).replace("{action}", front.getLine(1)).
+            new FormatBuilder(SignText.ERROR_SIGN_COMMAND_INVALID).replace(Placeholder.ACTION, front.getLine(1)).
-                    replace("{data}", front.getLine(2)).error(player);
+                    replace(Placeholder.DATA, front.getLine(2)).error(player);
         }
     }
 

src/main/java/net/knarcraft/bookswithoutborders/manager/EconomyManager.java

@@ -3,6 +3,7 @@ package net.knarcraft.bookswithoutborders.manager;
 import net.knarcraft.bookswithoutborders.BooksWithoutBorders;
 import net.knarcraft.bookswithoutborders.config.BwBConfig;
 import net.knarcraft.bookswithoutborders.config.translation.CostMessage;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.knarlib.formatting.FormatBuilder;
 import net.milkbowl.vault.economy.Economy;
 import org.bukkit.Material;
@@ -83,8 +84,8 @@ public class EconomyManager {
             payForBookPrintingItem(player, itemCost);
             return false;
         } else {
-            new FormatBuilder(CostMessage.ERROR_COST_INSUFFICIENT_AMOUNT).replace("{cost}",
+            new FormatBuilder(CostMessage.ERROR_COST_INSUFFICIENT_AMOUNT).replace(Placeholder.COST,
-                    String.valueOf(itemCost)).replace("{currency}", bookCurrency.toString()).error(player);
+                    String.valueOf(itemCost)).replace(Placeholder.CURRENCY, bookCurrency.toString()).error(player);
             return true;
         }
     }
@@ -100,7 +101,7 @@ public class EconomyManager {
         List<ItemStack> books = getPlayersEmptyBooks(player);
         if (countItems(books) < itemCost) {
             new FormatBuilder(CostMessage.ERROR_COST_INSUFFICIENT_WRITABLE_BOOK).
-                    replace("{cost}", String.valueOf(itemCost)).error(player);
+                    replace(Placeholder.COST, String.valueOf(itemCost)).error(player);
             return false;
         } else {
             int clearedAmount = 0;
@@ -173,12 +174,12 @@ public class EconomyManager {
 
         if ((economy.getBalance(player) - cost) >= 0) {
             economy.withdrawPlayer(player, cost);
-            new FormatBuilder(CostMessage.SUCCESS_COST_PAID).replace("{cost}", economy.format(cost)).
+            new FormatBuilder(CostMessage.SUCCESS_COST_PAID).replace(Placeholder.COST, economy.format(cost)).
-                    replace("{copies}", String.valueOf(numCopies)).
+                    replace(Placeholder.COPIES, String.valueOf(numCopies)).
-                    replace("{balance}", economy.format(economy.getBalance(player))).success(player);
+                    replace(Placeholder.BALANCE, economy.format(economy.getBalance(player))).success(player);
             return true;
         } else {
-            new FormatBuilder(CostMessage.ERROR_COST_INSUFFICIENT_ECONOMY).replace("{cost}", economy.format(cost)).error(player);
+            new FormatBuilder(CostMessage.ERROR_COST_INSUFFICIENT_ECONOMY).replace(Placeholder.COST, economy.format(cost)).error(player);
             return false;
         }
     }

src/main/java/net/knarcraft/bookswithoutborders/thread/MigrationQueueThread.java

@@ -2,6 +2,7 @@ package net.knarcraft.bookswithoutborders.thread;
 
 import net.knarcraft.bookswithoutborders.BooksWithoutBorders;
 import net.knarcraft.bookswithoutborders.config.StaticMessage;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.config.translation.Translatable;
 import net.knarcraft.bookswithoutborders.container.EncryptedBook;
 import net.knarcraft.bookswithoutborders.container.MigrationRequest;
@@ -100,7 +101,7 @@ public class MigrationQueueThread implements Runnable {
 
         if (!extension.equalsIgnoreCase("txt") && !extension.equalsIgnoreCase("yml")) {
             BooksWithoutBorders.log(Level.WARNING, new FormatBuilder(StaticMessage.EXCEPTION_UNEXPECTED_EXTENSION.toString()).
-                    replace("{extension}", extension).toString());
+                    replace(Placeholder.EXTENSION, extension).toString());
             return true;
         }
 
@@ -119,7 +120,7 @@ public class MigrationQueueThread implements Runnable {
 
         if (loadedBook == null) {
             BooksWithoutBorders.log(Level.SEVERE, new FormatBuilder(StaticMessage.EXCEPTION_MIGRATE_BOOK_LOAD_FAILED.toString()).
-                    replace("{path}", file.getAbsolutePath()).toString());
+                    replace(Placeholder.PATH, file.getAbsolutePath()).toString());
             return false;
         }
 
@@ -149,8 +150,8 @@ public class MigrationQueueThread implements Runnable {
             }
             return deleteBook(file.getParentFile(), newName, file);
         } catch (IllegalArgumentException | IOException exception) {
-            new FormatBuilder(Translatable.ERROR_MIGRATION_BOOK_FAILED).replace("{file}", file.getName()).
+            new FormatBuilder(Translatable.ERROR_MIGRATION_BOOK_FAILED).replace(Placeholder.FILE, file.getName()).
-                    replace("{exception}", exception.getMessage()).error(player);
+                    replace(Placeholder.EXCEPTION, exception.getMessage()).error(player);
             return false;
         }
     }

src/main/java/net/knarcraft/bookswithoutborders/utility/BookFileUtil.java

@@ -4,6 +4,7 @@ import net.knarcraft.bookswithoutborders.BooksWithoutBorders;
 import net.knarcraft.bookswithoutborders.config.BwBConfig;
 import net.knarcraft.bookswithoutborders.config.StaticMessage;
 import net.knarcraft.bookswithoutborders.config.translation.Formatting;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.state.BookDirectory;
 import net.knarcraft.knarlib.formatting.FormatBuilder;
 import org.bukkit.Bukkit;
@@ -211,8 +212,8 @@ public final class BookFileUtil {
         if (InputCleaningUtil.cleanString(bookName).contains(separator) ||
                 InputCleaningUtil.cleanString(authorName).contains(separator)) {
             throw new IllegalArgumentException(new FormatBuilder(StaticMessage.EXCEPTION_META_HAS_SEPARATOR.toString()).
-                    replace("{author}", authorName).replace("{title}", bookName).
+                    replace(Placeholder.AUTHOR, authorName).replace(Placeholder.TITLE, bookName).
-                    replace("{separator}", separator).toString());
+                    replace(Placeholder.SEPARATOR, separator).toString());
         }
 
         return InputCleaningUtil.cleanString(bookName + separator + authorName);

src/main/java/net/knarcraft/bookswithoutborders/utility/EncryptedBookUtil.java

@@ -3,6 +3,7 @@ package net.knarcraft.bookswithoutborders.utility;
 import net.knarcraft.bookswithoutborders.BooksWithoutBorders;
 import net.knarcraft.bookswithoutborders.config.BwBConfig;
 import net.knarcraft.bookswithoutborders.config.StaticMessage;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.config.translation.Translatable;
 import net.knarcraft.bookswithoutborders.container.EncryptedBook;
 import net.knarcraft.bookswithoutborders.encryption.AES;
@@ -320,7 +321,7 @@ public final class EncryptedBookUtil {
         }
         BooksWithoutBorders.log(Level.SEVERE, new FormatBuilder(
                 StaticMessage.EXCEPTION_ENCRYPTED_FILE_DELETE_FAILED.toString()).
-                replace("{path}", file.getPath()).toString());
+                replace(Placeholder.PATH, file.getPath()).toString());
     }
 
     /**

src/main/java/net/knarcraft/bookswithoutborders/utility/InventoryUtil.java

@@ -1,10 +1,12 @@
 package net.knarcraft.bookswithoutborders.utility;
 
 import net.knarcraft.bookswithoutborders.config.StaticMessage;
+import net.knarcraft.bookswithoutborders.config.translation.Placeholder;
 import net.knarcraft.bookswithoutborders.config.translation.Translatable;
 import net.knarcraft.bookswithoutborders.state.BookHoldingState;
 import net.knarcraft.bookswithoutborders.state.ItemSlot;
 import net.knarcraft.knarlib.formatting.FormatBuilder;
+import net.knarcraft.knarlib.formatting.TranslatableMessage;
 import org.bukkit.Material;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
@@ -73,22 +75,20 @@ public final class InventoryUtil {
      * Performs checks to validate that a player contains exactly one unwritten book
      *
      * @param player <p>The player to validate</p>
-     * @param noBookMessage   <p>The message to display if the player is not holding a book</p>
+     * @param action <p>The action to replace the placeholder with</p>
-     * @param twoBooksMessage <p>The message to display if the player is holding one book in each hand</p>
      * @return <p>False if the player is holding exactly one book</p>
      */
-    public static boolean notHoldingOneWritableBookCheck(@NotNull Player player, @NotNull FormatBuilder noBookMessage,
+    public static boolean notHoldingOneWritableBookCheck(@NotNull Player player, @NotNull TranslatableMessage action) {
-                                                         @NotNull FormatBuilder twoBooksMessage) {
         BookHoldingState holdingState = getBookHoldingState(player);
 
         if (holdingState == BookHoldingState.NONE || holdingState == BookHoldingState.SIGNED_BOTH_HANDS ||
                 holdingState == BookHoldingState.SIGNED_MAIN_HAND || holdingState == BookHoldingState.SIGNED_OFF_HAND) {
-            noBookMessage.error(player);
+            new FormatBuilder(Translatable.ERROR_NOT_HOLDING_WRITABLE_BOOK).replace(Placeholder.ACTION, action).error(player);
             return true;
         }
 
         if (holdingState == BookHoldingState.UNSIGNED_BOTH_HANDS) {
-            twoBooksMessage.error(player);
+            new FormatBuilder(Translatable.ERROR_ONLY_ONE_BOOK).replace(Placeholder.ACTION, action).error(player);
             return true;
         }
 
@@ -99,22 +99,20 @@ public final class InventoryUtil {
      * Performs checks to validate that a player contains exactly one written book
      *
      * @param player <p>The player to validate</p>
-     * @param noBookMessage   <p>The message to display if the player is not holding a book</p>
+     * @param action <p>The action to replace the placeholder with</p>
-     * @param twoBooksMessage <p>The message to display if the player is holding one book in each hand</p>
      * @return <p>False if the player is holding exactly one book</p>
      */
-    public static boolean notHoldingOneWrittenBookCheck(@NotNull Player player, @NotNull FormatBuilder noBookMessage,
+    public static boolean notHoldingOneWrittenBookCheck(@NotNull Player player, @NotNull TranslatableMessage action) {
-                                                        @NotNull FormatBuilder twoBooksMessage) {
         BookHoldingState holdingState = getBookHoldingState(player);
 
         if (holdingState == BookHoldingState.NONE || holdingState == BookHoldingState.UNSIGNED_BOTH_HANDS ||
                 holdingState == BookHoldingState.UNSIGNED_MAIN_HAND || holdingState == BookHoldingState.UNSIGNED_OFF_HAND) {
-            noBookMessage.error(player);
+            new FormatBuilder(Translatable.ERROR_NOT_HOLDING_WRITTEN_BOOK).replace(Placeholder.ACTION, action).error(player);
             return true;
         }
 
         if (holdingState == BookHoldingState.SIGNED_BOTH_HANDS) {
-            twoBooksMessage.error(player);
+            new FormatBuilder(Translatable.ERROR_ONLY_ONE_BOOK).replace(Placeholder.ACTION, action).error(player);
             return true;
         }
 

src/main/resources/strings.yml

@@ -13,10 +13,10 @@ en:
   SUCCESS_BOOK_LOADED: "Book created!"
   SUCCESS_MIGRATION_STARTED: "Starting book migration..."
   SUCCESS_RELOADED: "Configuration, books and language strings reloaded!"
-  SUCCESS_SAVED: "Book Saved as &e\"{fileName}\"&r"
+  SUCCESS_SAVED: "Book Saved as &e\"{file}\"&r"
   SUCCESS_SET_AUTHOR: "Book author set to {author}!"
   SUCCESS_COST_REMOVED: "Price to create books removed!"
-  SUCCESS_COST_ITEM_SET: "Book creation price set to {quantity} {price}(s)!"
+  SUCCESS_COST_ITEM_SET: "Book creation price set to {quantity} {cost}(s)!"
   SUCCESS_COST_ECONOMY_SET: "Book creation price set to {cost}!"
   SUCCESS_COST_PAID: |
     {cost} withdrawn to create {copies} book(s)
@@ -81,7 +81,7 @@ en:
   ERROR_SAVE_FILE_SYSTEM_ERROR: "Saving Failed! If this continues to happen, consult a server admin!"
   ERROR_SAVE_OVERWRITE_REQUIRED: "Use &e{command}&r to overwrite!"
   ERROR_SAVE_DUPLICATE_NAMED: "Book is already saved!"
-  ERROR_SAVE_DUPLICATE_UNNAMED: "Maximum amount of {fileName} duplicates reached!"
+  ERROR_SAVE_DUPLICATE_UNNAMED: "Maximum amount of {file} duplicates reached!"
   ERROR_UNKNOWN_COMMAND: "Invalid command specified"
   ERROR_AUTHOR_BLANK: "You must specify an author"
   ERROR_COST_NOT_SPECIFIED: "[Item/Eco] and [quantity] must be specified!"
@@ -129,7 +129,7 @@ en:
     {bookPrice}&eCommands:
     {commandExplanation}&r
     {commands}
-  NEUTRAL_COMMANDS_BOOK_PRICE_ECO: "\n&c[{price} is required to create a book]"
+  NEUTRAL_COMMANDS_BOOK_PRICE_ECO: "\n&c[{cost} is required to create a book]"
   NEUTRAL_COMMANDS_BOOK_PRICE_ITEM: "&c[{quantity} {type} (s) are required to create a book]\n"
   NEUTRAL_COMMANDS_COMMAND: "\n&e{usage}{aliases}: &a{description}"
   NEUTRAL_COMMANDS_SUMMARY: "\n&eCommand: &aUsage summary"
@@ -156,7 +156,7 @@ en:
   NEUTRAL_BOOK_LIST_PATH_HOVER: "Select book by path"
   NEUTRAL_BOOK_LIST_BOOK_INDEX_HOVER: "Select book by index"
   NEUTRAL_BOOK_LIST_BOOK_INDEX_NUMBER: "[{index}]"
-  NEUTRAL_BOOKSHELF_HEADER_TITLE: "&nBookshelf summary\n&#FF5700Books in {name}&r&#FF5700:{lore}"
+  NEUTRAL_BOOKSHELF_HEADER_TITLE: "&nBookshelf summary\n&#FF5700Books in {title}&r&#FF5700:{lore}"
   NEUTRAL_BOOKSHELF_HEADER_LORE: "\n  &d{lore}&r"
   NEUTRAL_BOOKSHELF_HEADER_TITLE_EMPTY: "shelf"
   NEUTRAL_BOOKSHELF_HEADER_TOP: "\n &#FF5700Top Row:&r"
@@ -186,3 +186,46 @@ en:
   ERROR_SIGN_INVALID: "Invalid sign!"
   ERROR_SIGN_COMMAND_INVALID: "Sign command {action} {data} is invalid"
   SUCCESS_SIGN_GIVE: "Received book!"
+  # ------------ #
+  # Placeholders #
+  # -------------¤
+  # Warning: Replacing any of these require them to be replaced in every other string in this file that contains the
+  # placeholder. Avoid changing these unless it's necessary, or you know what you're doing! Some placeholders may also
+  # be used in non-customizable error messages.
+  # ------------ #
+  FILE: "{file}"
+  AUTHOR: "{author}"
+  ACTION: "{action}"
+  DATA: "{data}"
+  INDEX: "{index}"
+  QUANTITY: "{quantity}"
+  COST: "{cost}"
+  TITLE: "{title}"
+  DISPLAY_NAME: "{displayName}"
+  LINE: "{line}"
+  PASSWORD: "{password}"
+  COMMAND: "{command}"
+  EXCEPTION: "{exception}"
+  PATH: "{path}"
+  EXTENSION: "{extension}"
+  HEADER: "{header}"
+  TEXT: "{text}"
+  SEPARATOR: "{separator}"
+  CURRENT: "{current}"
+  TOTAL: "{total}"
+  CHARACTER: "{character}"
+  PAGE: "{page}"
+  BOOK_PRICE: "{bookPrice}"
+  COMMANDS: "{commands}"
+  COMMAND_EXPLANATION: "{commandExplanation}"
+  PLAYER: "{player}"
+  CURRENCY: "{currency}"
+  FOLDER: "{folder}"
+  TYPE: "{type}"
+  PERMISSION: "{permission}"
+  USAGE: "{usage}"
+  DESCRIPTION: "{description}"
+  ALIASES: "{aliases}"
+  LORE: "{lore}"
+  COPIES: "{copies}"
+  BALANCE: "{balance}"