Wiktionary:Babel
de Dieser Benutzer spricht Deutsch als Muttersprache.
en-2 This user is able to contribute with an intermediate level of English.
ru-1 Этот участник владеет русским языком на начальном уровне.
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Mainly I'm working on the german Wikipedia. Due to my global account there is space for a page here - so I fill it with these lines...

(BTW: This Noether current fulfills the Continuity equation :-)

For further details look at my page in german.