Why it matters

Global apps need multi-language. Understanding shapes international agents.

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The architecture

Language detection: identify user language.

Response in same language: prompt LLM appropriately.

Multi-language supportDetect languageinput analysisRespond in sameinstruct LLMLocale-specificcultural adaptationGemini + modern LLMs handle 40+ languages natively
Multi-language flow.
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How it works end to end

Language detection: langdetect, fastText, or LLM.

Prompt instruction: 'respond in {language}'.

Localization: numbers, dates, cultural context.

Testing: eval per major language.