Furthermore, I still don't think this a huge cultural difference.

Nobody can guess her age.

He's bound to forget.

It's not your mother tongue, so your pronunciation will never be accurate.

If there are genuine differences between these two cultures, I think that the largest are certainly in what you think about foreigners studying your native language.

This person only thinks about themselves and doesn’t consider others. If you ask for their help, you’re bound to run into trouble.