I actually created our Bengali post and translated it into an English post. I'm actually new, so I didn't understand. I wrote this whole thing in Bengali and then Google translated it, I didn't know that AI would detect something like this later.
I don't know if you are telling the truth here, because I can't believe that Google Translate can provide such accurate translations, because I've used it a lot (not for posts in the forum) and I know that it makes a lot of mistakes, but your post doesn't seem to have that many mistakes, especially with words and stuff because Google translate often provides wrong translation for certain words.
Even that tool (allegedly) uses some form of AI and that's why such posts are flagged by AI detectors. This whole AI circus has created real chaos in the online world, you can no longer tell if something was created by a human or artificial intelligence.
It's best for one to try and not use tools that change whole sentences because it's obvious, almost every tool these days is powered by AI, and even if there is no AI, they work through algorithms, and algorithms basically work the same way, they don't make mistakes, and your sentence structure will be perfect, and that's what AI detectors detect basically. Some translation tools do that as well, but with Google Translate, I don't think your translation will be detected as AI because it won't do it to perfection, at least not every time.