System translations chinese

It's me again . 
last week i starting study at github for git.and closed my reguest just by some mistake.
here's new reguest,i make a new btanch named just as the title.
the font have changed to DroidSansFallback.ttf,and add a LICENSE GPLv2 for it (seem right or not).
thaks for your reply.
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PS:I haved translating the tutorial of version6.17.3,and i'm proofreading it.
PS2:and my friends is translating for doc also.
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That's all.