I’ve tested this. The documentation seems to indicate that this should be possible, but it doesn’t work.
Here is what I did:
- installed a translation app
- published a language - “German”
- added some translated content for this language
- added the “Accept-Language” HTTP Header to the Storefront API request and gave it the value of the ISO-code of the language, “de”
But the content comes back in English. Has anyone else tried this and had more success?