I went to a Spanish language mass once, for a funeral where I was helping to do the post-funeral dinner. I don't have much Spanish language background, only one semester after a whole lot of french and a little Latin, but even then, I could tell that the Spanish seemed more accurate on some points where I knew the English was badly worded, and I felt cheated.
Ummmnnhhh...read the Spanish text of the Epistle and Gospel sometime. You don't have to be a linguist to discern that their text has MANY different translations than the English.