I think I have already deleted every previous post of mine that was not written in English? (Not included those daily nonsense, after all they are not appear directly on my profile) So it looks good.
I do think that restricted to English for posting in local timeline will definitely help create a better community experience. (From a perosn who never toot anything puclically, lol)
(And hoenestly I don't think anyone will read my toot, lol)