You need to understand that we don’t use English for our day to day conversations. Children are just learning to be familiar with English. Is it possible to teach them the language through computers ? I prefer keeping the lessons offline as far as possible.
But it’s not ‘gaming’, it’s ‘learning’. And for all of those there’s plenty of walktroughs around if you get stuck. I’m currently playing the newest Monkey island and it has the spirit of old titles, but it has a ‘hint book’ where you can just practically skip puzzles you can’t figure answer for. That one relies heavily on the old games at the story tho, so it may not be the best one to start with.
But yeah, that might be a concern. You can try a lot of those out at Internet Archive before setting up a dosbox, so it’s atleast cheap to try and see how it goes.