assertArrays(new String[] { "ja", "zh-cn" }, fessConfig.normalizeQueryLanguages(new String[] { "ja", "zh" }));
        assertArrays(new String[] { "ja", "zh-cn" }, fessConfig.normalizeQueryLanguages(new String[] { "ja", "zh_CN" }));
        assertArrays(new String[] { "ja", "zh-cn" }, fessConfig.normalizeQueryLanguages(new String[] { "ja", "zh-cn" }));

        value = "zh";
        assertEquals("zh", systemHelper.normalizeLang(value));

        value = "zh-cn";
        assertEquals("zh_CN", systemHelper.normalizeLang(value));

        value = "zh_CN";
        assertEquals("zh_CN", systemHelper.normalizeLang(value));

        value = "zh-tw";
        assertEquals("zh_TW", systemHelper.normalizeLang(value));

     * te=te<br>
     * th=th<br>
     * tl=tl<br>
     * tr=tr<br>
     * uk=uk<br>
     * ur=ur<br>
     * vi=vi<br>
     * zh-cn=zh-cn<br>
     * zh_CN=zh-cn<br>
     * zh-tw=zh-tw<br>
     * zh_TW=zh-tw<br>
     * zh=zh<br>
     *  */
    String QUERY_LANGUAGE_MAPPING = "query.language.mapping";

    /** The key of the configuration. e.g. 0.5 */