I often forget to see answerers' native language and get wrong ideas 聼起來自然嗎?

I often forget to check/look at answerers' native language(s) and get the wrong idea

Language or languages are both right, but languages might be more commonly used.

I hear people say either plural or singular nouns after “everyone’s”, “everybody’s”, “their”, etc., so it’s not that straightforward to answer this. I looked into it and found this study that says using the plural noun is more widely used and perhaps clearer. But both would certainly sound natural to an English-speaker.

https://languagelog.ldc.upenn.edu/nll/?p=286