TMDB returns English series responses instead of requested language

It seems that sometimes TMDB is returning English responses instead of the requested language.
This is based on these two test runs of the same code:
https://github.com/UniversalMediaServer/api/actions/runs/4726660979/jobs/8386466092?pr=1182
https://github.com/UniversalMediaServer/api/actions/runs/4726660652/jobs/8386465584?pr=1182
search the logs for tv tmdbData 1 and you'll see one of them received an English result, and one received a French result. The French result is the correct one.

Note that we have fixed this test flakiness now by mocking the response in https://github.com/UniversalMediaServer/api/pull/1182 but in production the bug will still be happening.

If we can confirm it more, maybe we should report the bug to TMDB. It's possible that it's not a bug with the TMDB service itself though, like maybe network caching or a fallback in the third-party Node library code. Those things should be ruled out before reporting to them. It's worth noting that I can't reproduce the failure at all locally, even when I ran it hundreds of times in a loop.

You can restore the unmocked behaviour for debugging this by removing the TMDB_API_KEY=foo from the test:mocks script in package.json

Start with the TMDB request path and the test:mocks script in package.json; remove TMDB_API_KEY=foo to restore the unmocked behavior and reproduce the two linked CI runs. Compare the responses while checking for network caching or fallback behavior in the third-party Node library. Done means identifying the source of the incorrect language response or gathering enough evidence to report it to TMDB.