}

    @Test
    void testLocaleIndependent() {
        Locale orig = Locale.getDefault();
        Locale[] locales = {Locale.ENGLISH, new Locale("tr"), Locale.getDefault()};
        try {
            for (Locale locale : locales) {
                Locale.setDefault(locale);
                checkVersionsEqual("1-abcdefghijklmnopqrstuvwxyz", "1-ABCDEFGHIJKLMNOPQRSTUVWXYZ");
            }

                    @Override
                    public List<Map<String, String>> load(final String key) throws Exception {
                        final ULocale uLocale = new ULocale(key);
                        final Locale displayLocale = uLocale.toLocale();
                        final List<Map<String, String>> langItems = new ArrayList<>(supportedLanguages.length);

        /**
         * Returns the locale.
         *
         * @return The locale.
         */
        public Locale getLocale() {
            return locale;
        }

        /**
         * Sets the locale.
         *
         * @param locale The locale.
         */
        public void setLocale(final Locale locale) {
            this.locale = locale;
        }
    }

    /**

            final Set<String> langSet = new HashSet<>();
            final Enumeration<Locale> locales = request.getLocales();
            if (locales != null) {
                while (locales.hasMoreElements()) {
                    final Locale locale = locales.nextElement();
                    final String normalizeLang = systemHelper.normalizeLang(locale.toString());
                    if (normalizeLang != null) {

     *
     * @param locale the locale (must not be {@literal null})
     * @return the pattern string for {@link DateFormat#MEDIUM} style
     */
    public static String getMediumPattern(final Locale locale) {
        assertArgumentNotNull("locale", locale);
        return ((SimpleDateFormat) getDateInstance(MEDIUM, locale)).toPattern();
    }

    /**

     *
     * @param locale
     *            Locale. Must not be {@literal null}.
     * @return the pattern string for {@link DateFormat#MEDIUM} style
     */
    public static String getMediumPattern(final Locale locale) {
        assertArgumentNotNull("locale", locale);
        return ((SimpleDateFormat) getTimeInstance(MEDIUM, locale)).toPattern();
    }

    /**

     *
     * @param locale
     *            Locale. Must not be {@literal null}.
     * @return the pattern string for {@link DateFormat#MEDIUM} style
     */
    public static String getMediumPattern(final Locale locale) {
        assertArgumentNotNull("locale", locale);
        return ((SimpleDateFormat) getDateTimeInstance(MEDIUM, MEDIUM, locale)).toPattern();
    }

    /**

        assertFalse(labelTypeHelper.matchLocale(Locale.ENGLISH, Locale.JAPANESE));
        assertFalse(labelTypeHelper.matchLocale(Locale.SIMPLIFIED_CHINESE, Locale.TRADITIONAL_CHINESE));

        assertTrue(labelTypeHelper.matchLocale(null, Locale.ROOT));
        assertTrue(labelTypeHelper.matchLocale(Locale.ENGLISH, Locale.ROOT));
        assertTrue(labelTypeHelper.matchLocale(Locale.ROOT, Locale.ROOT));

        // Execute
        OptionalThing<Locale> result = provider.findBusinessLocale(null, mockRequestManager);

        // Verify
        assertTrue(result.isPresent());
        Locale locale = result.get();
        assertEquals("no", locale.getLanguage());
        assertEquals("NO", locale.getCountry());
        assertEquals("NY", locale.getVariant());
    }

# Access: http://localhost:8080/admin/?browser_lang=sv
```

## Troubleshooting

### Language doesn't appear in dropdown

- Verify both `fess_label_[locale].properties` and `fess_message_[locale].properties` exist
- Check that locale code is in `supported.languages` in `fess_config.properties`
- Regenerate Java classes: `mvn dbflute:freegen`
- Rebuild project: `mvn clean package`
- Restart Fess application