Symfony version(s) affected

7.1.*

Description

#52986 changed the way, the Accept-Language header is interpreted.
However, I'm not sure the exact match is always what you want.

Given I have the locales ['de', 'en'] available and I send Accept-Language: de-de, en, I would now get en as the result because en is an exact match. Previously it was de which imho was the better choice. Any German dialect would be better than English in this case. Even if I'd adjust factor weighting Accept-Language: de-de,en;q=0.9, Symfony would still pick en.

Are we sure this is the desired behavior?

/cc @Spomky

How to reproduce

The test in RequestTest::providePreferredLanguage() would be this:

yield '"de" is selected as "de-de" is a better choice than "en"' => ['de', 'de-de, en', ['de', 'en']];

Possible Solution

No response

Additional Context

No response