Issue with Multilingual Bot Created in Copilot Studio (Not Working as expected in Microsoft Teams)

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Posted on by NaveenR

Hi Team,

Could you please help in this

I have created a Multilingual bot using Copilot Studio and integrated it into Microsoft Teams. However, when I try to interact with the bot in Teams, it does not function as expected

Here are the steps I followed:
Created the bot in Copilot Studio and added primary language and secondary languages
Integrated the bot into Microsoft Teams following the official guidelines.
Tried to interact with the bot in a Teams channel but it does not function as expected

Example Scenario:

Primary language: Spanish and secondary languages are English and French and bot knowledge documents are in Spanish (Allow the AI to use its own general knowledge option is disabled)

When I interact with Bot in Spanish language (Bot Input) with Teams language Spanish it works fine and giving me the desired response in Spanish

But when I interact with Bot in Spanish language (Bot Input) with Teams language as English it doesn't work and giving unknown intent response in Spanish language and

if I try the same input in English, it works fine and responded in English.

is it Teams channel issue or am I missing anything in Bot configuration?

Thanks

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Vinoth Selvam 1,592 Super User 2025 Season 1 on at

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Hi NaveenR ,

Teams typically attempts to interact with bots in the language set in the Teams app. However, it can sometimes default to the bot’s primary language if there’s a mismatch between the bot’s language settings and the Teams user’s language settings.

Since your knowledge documents are in Spanish and you’ve disabled general knowledge usage, the bot will rely solely on the provided documents for Spanish responses. For English and French, ensure there are equivalent knowledge resources or that language translation/matching settings allow fallback if a response isn’t available in one language.

If knowledge responses are limited to Spanish, ensure that English or French responses are set up either as separate documents or by using an AI translation tool within the bot configuration.

Else you can add a custom translation API as a workaround.

Thanks.

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NaveenR 20 on at

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Thanks for the response,

Can we change the entire bot language into user query language?

like if user types query in French, then bot should start responding in French and if we have any follow-up question then those also should show in French language. (knowledge source content is available only in one language).

So, instead of translating only the knowledge source responses can we translate everything like change the bot locale

if yes, could you please provide the steps which we need to follow in copilot studio? does this configuration works in all the channels (specifically teams)

Thanks

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