Add an option to select a language when searching for strings

Hello

I am enjoying the app to translate online Drupal. I translate to Catalan and Spanish. Besides translating, I use the app to find strings that are already translated to keep unity. English and these two languages have words written equally but don't mean the same. As for example "data" that in Catalan means "date". It would be very helpful to be able to choose in the form http://localize.drupal.org/translate/languages/ca/translate, in the "Reveal more filters" area, which language one would like to search. It could be a select where you choose English or the other language that you are translating.

Thanks a lot for the app :)