[Koha] I can not find a field to stores language of books in Koha database-new.

[Zhang Chunxiao]

Hello,Everybody: 
I can not find a field to stores language of books in the Koha Database in 
mysql. 
Is there a field storing the languages? I don't mean the language of Koha's 
user interface.I don't need MARC support too. 
  Thanks

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