I always play games in english instead of spanish (my first language), since translations are terrible and you lose a lot of personality, expressions, etc.
However, after trying both ways, I am playing the game in spanish and I am really surprised and thanksful about it.
The translations are really good, they have been made with care, it is as if they had been translated by a RPG gamer itself, and educated one, and who had investigated about it before, AND is a native spanish speaker. (From Spain)
I cant even imagine the effort this would take for all languages. If they had done it on purpose, I would like to express my gratitude!
Really helps the immersion since it is heavy and difficult reading, I would be missing words in english.
PS: However, the translations of skills/spells are terrible. "50 damage over 6 seconds" is not translated correctly at all, and it is really confusing. Really minor thing, since any RPG gamer knows what they mean more or less. I can look for those in a wiki or something, or even put it in english, read all skills, and put it back on spanish.