@Test
    public void test_matchLocale() {
        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));

Translate an English original content to a target language.

The original content is written in Markdown, write the translation in Markdown as well.

The original content will be surrounded by triple percentage signs (%%%). Do not include the triple percentage signs in the translation.

### Technical terms in English

For technical terms in English that don't have a common translation term, use the original term in English.

- Translate headings using the infinite form.

Examples:

Source (English):

```
## Create a Project { #create-a-project }
```

Result (German):

```
## Ein Projekt erstellen { #create-a-project }
```

Do NOT translate with (German):

```
## Erstellen Sie ein Projekt { #create-a-project }
```

Source (English):

```
# Install Packages { #install-packages }
```

            [
                "There is an existing previous translation for the original English content, that may be outdated.",
                "Update the translation only where necessary:",
                "- If the original English content has added parts, also add these parts to the translation.",

Currently supported UI languages: German, English, Spanish, French, Italian, Japanese, Korean, Dutch, Polish, Brazilian Portuguese, Russian, Simplified Chinese, and Traditional Chinese.

## File Structure

Language resource files are located in:
```
src/main/resources/
├── fess_label.properties           # Base English labels (fallback)

     */
    @SuppressWarnings("unchecked")
    protected Map<String, Object>[] getFromArrayIndex(final String index, final String type, final String key) {
        final String actualIndex = index + "." + type.toLowerCase(Locale.ENGLISH);
        try {
            SearchResponse response = client.prepareSearch()
                    .setIndices(actualIndex)
                    .setScroll(settings.getScrollTimeout())

* Check if things are okay in the translation.
* If necessary, improve your language specific prompt, the general prompt, or the English document.
* Then manually fix the remaining issues in the translation, so that it is a good translation.

                return StringUtil.EMPTY;
            }
        });
        getMockRequest().setLocale(Locale.ENGLISH);
        assertNull(systemHelper.getForumLink());
    }

    @Test
    public void test_getHelpLink() {
        getMockRequest().setLocale(Locale.ENGLISH);
        assertEquals("https://fess.codelibs.org/98.76/admin/xxx-guide.html", systemHelper.getHelpLink("xxx"));

    }

    @Test
    public void test_detectLanguage_withoutDetector() {
        // Without a real detector, this would cause NullPointerException
        try {
            languageHelper.detectLanguage("This is English text");
            fail("Should throw NullPointerException without detector");
        } catch (NullPointerException e) {
            // Expected
        }
    }

    @Test

                if (req.getAttribute(LastaWebKey.USER_LOCALE_KEY) instanceof Locale locale) {
                    return locale;
                }
                return Locale.ENGLISH;
            }).orElse(Locale.ENGLISH).getLanguage() + "\">";
        }
        return "</html>";
    }

    /**
     * Checks if a label with the specified key exists in the current request's label map.
     *