Clive is right, I have never seen a version 5 Spanish either; I use the quadlanguage v. 4 to do my work and had heard a rumor about a version of 5 that had Spanish menus, especially for reports.
As I tried to compare doing a backup/restore and the GEDCOM; I find either one acceptable. I probably could even work on 4, import to 5 when needed and the GEDCOM back to 4 when needed but I'll have to test it out some more to make sure I won't lose media references (like I did this weekend).
Is any other software more Spanish friendly?
Once I figure it out I'll be teaching some more people in a latino genealogy center on how I have been doing it.