Currently VocabTracker supports:
Chinese, Simplified and Traditional
English
French
Spanish
Italian
German
Arabic
Japanese
Russian
Korean
Dutch
Ukranian
Latin
Polish
Currently VocabTracker supports:
Chinese, Simplified and Traditional
English
French
Spanish
Italian
German
Arabic
Japanese
Russian
Korean
Dutch
Ukranian
Latin
Polish
I have heard a rumour that Portuguese is in the process of being added!