App for Contributing to Google Translate

I want to be able to contribute to Google Translate on my native language (Sinhala).

Although there is an online portal (http://translate.google.com/community/) where we can contribute to the translator by translating new phrases or validating existing translations, I could not find any Android apps that seem to support these features. I could not find any contribution-related features in the Google Translate app as well.

Does anyone know of any apps that offer these translation contribution features?

Thanks in advance.