chenese pinyin is not working

If you enter text in pinyin in google translate, it automatically creates the chinese symbols and translates it correctly to english, e.g.: https://translate.google.de/#view=home&op=translate&sl=zh-CN&tl=en&text=song
translates pinyin "song" to english "give away".

But if you enter

!translate zh en song

it ends up with

> Song

and

!translate zh en song

translates english "song" to german:

Lied

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