Returning a subset of fields

I am translating my application, and I have some texts in the db, which also have to be translated.

So I have a table:
id, text_en, text_de

In my datasource I have both fields, and depending on the language, I select one of them.
But the fetch returns ALL fields, so it would return both text_en, text_de,which would waste bandwidth. Is there a way to fetch only one of the fields, depending on something, in this case, of the language?

Using smartgwt 4.1p Power.