My 8-9 year old niece can't speak because of this. Our language has gendered nouns and she can't differentiate between them. She would say Mister to a woman or Mrs to a guy. Or call a guy a she, but this isn't just the only problem, but the conjugations as well.
The problem of course lay with the parents. Not to mention they let her use a regular YT account, well her fathers to be exact and I found out my niece had bookmarked 18+ videos on YT...which I promptly deleted and installed YT kids only for her father to revert to regular YT...on which I then activated child mode or whatever it is.