I'm not sure what your question is, since there is still a Spanish mIRC available from that site.. however:
1. As far as I know, the site you linked is not run by mIRC, and nobody here is the webmaster for it.
2. The site you linked violates not only mIRC's EULA, which means it is technically illegal to release that version, but they also ripped mIRC's site design and are posing as an official website, which is a serious legal problem on their end.
I'm not sure if this is the explanation you're looking for, but we can't really give you any help regarding a third party website.
