It's not the same though. It's written the same way in chinese characters, but when writing the sounds in the roman alphabet the differences are clear, Ni Hao vs Nei Hou.
no he is right hello translate to hallo. But likethejsdevil says, guten tag is often used to greet someone. (though I feel it is more formal than saying hallo)
Actually, Chinese is not legally a language as far as I know. But there are languages for China. There is Mandarin and Cantonese and maybe more, but according to my research, there is no language called Chinese, even though it is heard very often.
And since when is hello and hi not used in the same way in english. (ok hello is slightly more formal than hi, but everywhere you say hi you can say hello, but maybe you cant allways replace hello for hi, like when introducing yourself at a job interview, or something extremely formal)
If it was it'd probably be on JetPunk already.
In German and French (and others) the way of saying 'hello' is literally translated as 'good day'.
Could perhaps use a few more germanic (and slavic) languages. 4 asian, 4 romance, only 1 germanic, and 2 slavic.