}

    String getForumSupportedLangs();

    default boolean isForumSupportedLang(final String lang) {
        if (StringUtil.isBlank(getForumSupportedLangs())) {
            return false;
        }
        return split(getForumSupportedLangs(), ",").get(stream -> stream.filter(StringUtil::isNotBlank).anyMatch(s -> s.equals(lang)));
    }

     * The value is, e.g. en,ja <br>
     * comment: Supported languages for the forum.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getForumSupportedLangs();

    /**
     * Get the value for the key 'suggest.popular.word.seed'. <br>
     * The value is, e.g. 0 <br>
     * comment: Seed value for popular word suggestion.