I was an user of the i2e (english to spanish word translator; apt-get install i2e) and I wanted to support the project by adding new words but the project seems to be died. So I have taked the i2e dictionary and developed a little Gtk# application which is a new translator using MonoDevelop +Stetic and SQLite3. It also supports a lot of languages.
Unfortunately I forgot the YouTranslate project but I will study it for next releases and colaborations.
I encourage you to use SharpTranslator and increase the dictionary. Send me your translator.db with your new words to add it to the svn. Donwload the binary here.