LanguageEnum

public enum Language{
    ENGLISH("eng", "English"),
    SPANISH("esp", "Spanish"),
    FRENCH("frn", "French"),
    JAPANESE("jpn", "Japanese");

    static Map<String, Language> byKey = new HashMap<>();
    static {
        for (Language lang: Language.values()) {
            byKey.put(lang.getKey(), lang);
        }
    }

    final String key;
    final String name;

    Language(String key, String name) {
        this.key = key;
        this.name = name;
    }

    public getKey() {
        return key;
    }

    public getName() {
        return name;
    }

    public static Language getByKey(@NotNull String key) {
        return byKey.get(key);
    }
}