When you change the language in your user preferences, the presentation of the labels of the OmegaWiki data will change as well. It will tell you for instance where you can find the Wikipedia article in a given language.
The phrase "artigo na Wikipédia" is todays "Word of the day". Yesterday this translation was added and consequently the user interface for Portuguese became more complete.
Typically phrases like this can be found here, and yes you can make a difference too.