The language skills that someone needs in lol are ss (or mia), re, back, go and def. I think that everyone has it. Now if someone is asking his/her friend in chat what they have tomorrow for math (yeah I witnessed that) or what they're having for lunch I don't need to understand it.
In the EU servers you can choose a game languange, so that it's easier to understand the object's discription etc and that's why for example a lot of south americans play in EUW. Should we ban them from there too because the germans, italian, british, french etc don't speak spanish??
As for ping. it is sadly something that a summoner cannot control, so I don't think he should be punished for it. Usually there is at least one person in every team with 200 ms or more so the game is actually balanced.