/Knowledge/sources/honojs__hono/llms-full/language-middleware-advanced-configuration-language-code-transformation--567282c993fa.md
Language Middleware: Advanced Configuration > Language Code Transform...
Language Middleware: Advanced Configuration Language Code Transformation Source evidence: /Sources/honojs hono/provenance.md Canonical citation: https://hono...
Language Middleware: Advanced Configuration > Language Code Transformation
Source evidence: /Sources/honojs__hono/provenance.md Canonical citation: https://hono.dev/llms-full.txt#language-code-transformation
Summary
Normalize complex codes (e.g., en-US → en): ts app.use( languageDetector({ convertDetectedLanguage: (lang) => lang.split('-')[0], supportedLanguages: ['en', 'ja'], fallbackLanguage: 'en', }) )
Content
Normalize complex codes (e.g., en-US → en):
app.use(
languageDetector({
convertDetectedLanguage: (lang) => lang.split('-')[0],
supportedLanguages: ['en', 'ja'],
fallbackLanguage: 'en',
})
)
Metadata
{
"chunk_index": 0,
"citation": "https://hono.dev/llms-full.txt#language-code-transformation",
"coverage_role": "overview",
"qualified_title": "Hono / llms-full / Language Middleware > Advanced Configuration > Language Code Transformation",
"retrieved_at": "2026-07-02T05:51:01Z",
"section_index": 207,
"source_id": "/honojs/hono",
"source_type": "llms_full",
"target_label": "llms-full",
"title": "Language Middleware: Advanced Configuration > Language Code Transformation",
"upstream_url": "https://hono.dev/llms-full.txt",
"version": "2026"
}
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