Here you might be right because I mostly use translator to understand post well.

Because English is not my native language and when I write post I also check it with translator. If there is any mistake I simply correct it myself. So because of this you can say that my posts are being flagged as AI.

By the way I apologize. I made mistake in understanding your words again. As for GPTzero I do not even know about that tool. You are using it so you know better.