I have tried to post in the past, usually erasing my response due to anxiety of getting sentences wrong - honestly curious if anyone in those subforums would care or mind?
As far as I know, every local board is always supervised by mods/staff who are responsible for monitoring every discussion that is discussed in their respective locales, for this reason mods/local staff play an active role in taking action, if any other user answers and posts there, they will rate the detected grammar spam, language/translation errors and so on.
As in the French locale Rule[1].https://bitcointalk.org/index.php?topic=4964698.01 – Règles générales
1.1 - L’orthographe
Sans vous demander d’écrire comme Bernard Pivot, un minimum d’attention vous est demandé au sujet de l’orthographe et de la grammaire. Pour vous aider, il existe des extensions à votre navigateur internet, vous pouvez écrire dans un traitement de texte etc…
Le langage SMS, le l337 speaking et le Zalgo & co sont proscrits.
Evitez de mettre trop d’acronymes rendant difficile la compréhension de votre phrase.
Aérez votre message. Il sera plus agréable à lire.
My assessment of what happened to the OP, maybe the reason it was deleted was because the French grammar didn't match the spelling, it was difficult to understand and so on, even though you understand a few percent of French grammar.
This was confirmed based on what was written by @Halab/local French staff.