why has the chinese language been dilluted so much in asia as opposed to english?

i mean this in the way how chinese has been changed and manipulated so dramatically in countries such as korea and Japan, as opposed to how english (or any other language in fact) has barely changed in former colonies. Is it due to language complexity ?

I have a question regarding japanese, chinese, mandarin language?

Iam going to learn Chinese Mandarin for school as a elective. I was wondering if I go to china or Japan or someplace like that I can talk to the locals speaking mandarin? I also wan't to understand japanese or chinese tv shows and music! So my question is what is the primary language that japanese, korean, chinese , etc? I think from my understanding it is mandarin but Iam not sure.Thanks all
Well no I mean I can get the program from bestbuy or w/e.