I've hunted through the Card Vault documentation, but I can't find a list of the valid languages.
I tried to update the Magic.def file to include all teh languages that I know it's been printed in, but one or more of teh set I used failed
I tried to set languages="en+ge+fr+it+sp+pt+jp+kr+ch+ru"
(English, German, French, Italian, Spanish, Portugese, Japanese, Chinese [should really distinguish between the 2 different types of Chinese used on Magic cards I suppose] and Russian)
I tried to update the Magic.def file to include all teh languages that I know it's been printed in, but one or more of teh set I used failed

I tried to set languages="en+ge+fr+it+sp+pt+jp+kr+ch+ru"
(English, German, French, Italian, Spanish, Portugese, Japanese, Chinese [should really distinguish between the 2 different types of Chinese used on Magic cards I suppose] and Russian)