I'm assuming by "high level of english" you mean words/acronyms that aren't intuitively understandable? There are many of these such words thrown around here, and that is why a Glossary is provided for you for the basic web-related words: [webmasterworld.com...]
If you are speaking of diction in general then it would be good to read "higher" sentence structure, syntax, and word choice as it will expand your knowledge and usage of the english language. :)
Of course, if you don't understand something you can ask for clarification from the poster, as well.
Absolutely, I can certainly understand how hard it can be when English isn't a person's natural first language. Unfortunately, people type as they're thinking and having a discussion, and what they type is the way the thoughts come into their mind as they think about the issue being discussed.
My suggestion would be for such people to post in the New to Web Development Forum.
No, they may not be new to web development, but if they're pretty new to English, that's the best place to make sure people give answers that are as easy to understand as possible. Members know that they need to be extra careful in that forum, to make things easy to understand.