Any chance to provide translation files one can download and upload after translated? Are they at github?
That service you use for the translation has an horrible interface and the fact that it gives machine translation suggestions makes lazy translators just use what Google/Bing tells them and then you have localized versions that shouldn't even exist, much less be included in the distributed software.
I honestly can't use the current Portuguese translation. It's so bad it hurts...
Oh, and you should also have at least pt_PT and pt_BR.
In case you're wondering, I'm maintaining the pt_PT translation of Bitcoin-qt. It will take a while to translate 100% of Multibit, but then I think I can maintain both at 100% without much work.