ChatbotsLanguage handling

Design multilingual detection and fallback handling

Use for a bot that must detect a user's language, reply in it, and gracefully handle unsupported ones.

The prompt
prompt.txt
Write the language-handling rules for a multilingual chatbot.

Supported languages: {{supported_languages}}
Default language: {{default_language}}

Specify:
- How to detect the user's language from their first message and switch automatically.
- How to confirm switching once, not on every turn.
- Behavior for an unsupported language: detect it, apologize in that language using a fixed phrase, then continue in {{default_language}}.
- Handling of code-switching (mixed languages in one message).
- Keeping product names, links, and legal terms untranslated.
- A consistency rule so it never silently flips languages mid-conversation.

Output the rules block plus 3 example openers in different languages with the bot's correct response.

Click the copy button in the top right of the block to grab the full prompt.

Variables

Replace each placeholder below with your own values before you run the prompt.

  • {{supported_languages}}
  • {{default_language}}
Recommended models
Claude Opus 4.8GPT-5Gemini 2.5 Pro
Tags
#multilingual#i18n#fallback#detection

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