Totally agree with you!
It obviously does not work out how they are doing it now. They need to change something because now we are at a point were it is outright ridiculous.
I assume that they had professional translations for all foreign languages texts existing at game launch and also some time afterwards - depending on contracts.
But latest after a year into the game that ended and since then the translations severely degraded.
This is one reason I play Forza Horizon games not in my mother language but in English. I remember in FH4 on some occasions where the non-English texts in the Festival Playlist were just plain wrong - like listing a wrong car for the given task. The language quality of the translation was no better.