I uploaded an updated bitcoin.po for 0.3.1 attached to this message: http://bitcointalk.org/index.php?topic=151.msg1259#msg1259 please use it if you're starting a new translation. If you already have a po file, poedit can update it. - Get the src directory from the 0.3.1 release candidate posted in the development forum, any version will do: http://bitcointalk.org/index.php?topic=383.0 - Make a subdirectory under src: locale/??/LC_MESSAGES (?? could be anything really, "en" or your language 2-letter code) - Put your .po file there - Open it with poedit - In poedit, Catalog->Update from sources The key is that the src directory with the sourcefiles needs to be 3 directories up from the .po file.