Oh, he must be talking about the spanish version of Monster Collection. I never read it but considering it was done by the same translator of Akira it was probably a professional one. It was just luck since some older manga translations where awful, more like fanfic rewrites than anything...
Thanks for the update.
Guess the series was too unconventional for its own good, even when the second couple seemed more generic (as in it being a purely platonic relationship)