@SuppressWarnings("BooleanMethodIsAlwaysInverted")
    private static boolean isAdventureDuplicatesException(Exception e) {
        return e instanceof IllegalArgumentException && (e.getMessage().startsWith("Invalid key") || e.getMessage().startsWith("Translation already exists"));
    }
Loads custom translations (in any language) from the plugin configuration folder.
common/src/main/java/me/lucko/luckperms/common/locale/TranslationManager.java