For some reason i've decided to parse this header myself the other day, shouldn't be that hard i supposed. And it wasn't that hard and everything was working perfectly locally.
Then i deployed this to my prod and things started to act weird. Only one language was detected and so forth. Finally i noticed that in prod my header string looked like this.
"sv, fr; q=0.9, en; q=0.8, no; q=0.7"
and locally it looked like this
"sv,fr;q=0.9,en;q=0.8,no;q=0.7"
I'm not sure why and I'm not sure what is more correct. But i just needed to add some trim to my parsing method and now things works.
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