Order Search by prefered language

When are activated more languages, it can first list prefered language.
This way it can control better to download first languages.

Example:
Having English, Portuguese and Portuguese (Brazilian). On Opensubtitles always shows subtitles by this order:
1. Portuguese (Brazilian)
2. English
3. Portuguese

This way is possible to set Portuguese, English or Portuguese (Brasilian) as first language to apper on XMBC subtitles display.
I didn't know that, so the xml file isn't needed?
Should I add a .po file with what info? If you tell me how to translate I will do that!