What do you mean by learn chinese? Mandarin? Catonese? Fujianese? There are so many local dialects in China, saying chinese is equivalent to saying speak african, african isnt a language, it is a place with many languages used in it.
When people sat chinese, they usually mean mandarin. No big deal.
I'm learning Mandarin and Taiwanese. The site supports Cantonese, but I don't have a good data source (or local friends) to help me check it. See Advanced > Regional. Simplified/traditional conversion and bopomofo are all built-in.