You'd have to ask the Anonymous author himself.
They'll maybe work, but you'll have English messages appearing in the system, instead of Spanish ones.
Now, just to localize (=translate the messages), ResHacker, eXeScope and a lot of patience may win the day.
There is something about it here
, and other old posts by Petr
may be useful, too. Searching the forum may give you some other leads, too. Personally, I only use English (ENU or EN-US) versions. I have really no interest in localization, nor in localized OSes, so I never studied the problem myself, but I know Petr did have lots of success at it, before he gave up on Win 9x/ME.