Well, it is difficult to pronounce if you don't speak spanish, portuguese, italian, and probably others. For me, as native Spanish speaker is super easy to say.
The difficulty is that it doesn't follow unambiguous English pronunciation heuristics.
For example, I have no problem pronouncing "ender" because it has no elements that have unambiguous pronunciation. I also have no problem pronouncing "centre", because it's a well known word with well known pronunciation. But libre is not an existing English word, and "-bre" does not have an unambiguous pronunciation heuristics, so it's unclear how it is intended to be pronounced.
Not an issue in Spanish because it is (apparently) a word in Spanish.
Another example of a bad naming is Forgejo. Terrible. I'm sure it has very clear pronunciation if you speak Esperanto.
