I am getting a new error related with english languageI

[anoga...@gmail.com]

I have been working with a .rdf file for months. Now I want to work with a new version of it but when loading I get this exception.

Exception: 'en ' is not a valid language tag!

Can you help me?
Thanks

[anoga...@gmail.com]

Dindt see the blank after en, sorry.
Thanks.