Makes the fallback language configurable

pom.xml

@@ -84,5 +84,11 @@
             <version>1.19.2-R0.1-SNAPSHOT</version>
             <scope>provided</scope>
         </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>5.9.2</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 </project>

src/main/java/net/knarcraft/knarlib/formatting/Translator.java

@@ -48,10 +48,11 @@ public final class Translator {
      * Loads the languages used by this translator
      *
      * @param dataFolder       <p>The data folder to load custom strings from</p>
+     * @param fallbackLanguage <p>The default language to fall back on in the case of missing translations</p>
      * @param selectedLanguage <p>The currently selected language</p>
      */
-    public void loadLanguages(File dataFolder, String selectedLanguage) {
-        backupTranslatedMessages = loadTranslatedMessages("en");
+    public void loadLanguages(File dataFolder, String fallbackLanguage, String selectedLanguage) {
+        backupTranslatedMessages = loadTranslatedMessages(fallbackLanguage);
         translatedMessages = loadCustomTranslatedMessages(dataFolder, selectedLanguage);
         if (translatedMessages == null) {
             translatedMessages = loadTranslatedMessages(selectedLanguage);