Does anyone know how good the Kindle translation dictionaries are (e.g. Spanish-English, French-English, etc, dictionaries that you can bring up by selecting a

Does anyone know how good the Kindle translation dictionaries are (e.g. Spanish-English, French-English, etc, dictionaries that you can bring up by selecting a word)? Sony apparently has the reputation for having the best dictionaries, but the PRS-T1 I bought is so buggy it's nearly unusable - if I press a word, it has a one-in-three chance of freezing up for several minutes, and updating the firmware didn't help - so I'm thinking of switching to Kobo or Kindle, but I don't know if they're any better.