It is the English spelling, that's why there is no accent on the i. I understand that many people prefer the original Spanish spelling. But it makes no sense to tell people to fix their tags, because they either don't want to or they just aren't able to fix the tags. Keep in mind that there are online radio stations or streaming services like Pandora or Spotify which do not allow to edit tags before scrobbling. You can only fix your own tags and disable the auto-correction in last.fm website settings. Also tell last.fm to add an edit function for scrobbles to merge songs with different spellings in the library.