It's simple and if you used your small head and actually SEARCHED, you would have found the answer. In multiple threads (I know, right?).
DC cannot speak in languages besides English and German and he cannot check what content the people post if it's in a language he doesn't understand.
Also, it would be a lot of work.
Also, other languages won't be used so much as English (look at German section), it's needless to implement more
Also, you could just learn English like every other normal person who uses the internet
Also, the title 'I Really Dont Understand' doesn't really convey your thoughts
Also, capitalizing each word in your sentences does not add persuasiveness to your posts.
TL;DR: Search before you post, improve English instead, what you want will not happen.
Basically as these people above stated: there won't be any language implemented in and this idea has been asked like million of times and YET another user like you failed at searching the answers.
It doesn't make sense and it's annoying to repeat the same and same answer for a topic that has been discussed already. Welcome to the Internet lad, where people must at least learn basic English to communicate with each other, what did you expect?