How to choose language in prismic

I am using angular app as frontend . if my app wants change language then content should change language using prismic how to do that?..now my repo is in english language and i added another locale french when adding content do i have to add content in both language or it will automatically done prismic?..how will query content based on language ?..

Hello @9mm-energy-drink, thanks for reaching out.

After you create a new locale to your repository you can manage your localized content, you can create the translations from scratch, or copy the content from another locale. Discover how you can manage your multilanguage content here:

https://prismic.io/docs/core-concepts#languages-locales

Then you need to query your documents by language

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