Pages is very clever, in that if you have your system wide language set to Spanish, you end up with Spanish templates (I'm stating Spanish, but I assume it works for most languages). You should have a set of English templates on your computer somewhere, but as the other poster said, they just have blank text in them.
If your system wide language setting is not Spanish...hmm...then something is going on there.
Edit: Oh nevermind...from rereading the OP I see that he/she is most likely mistaking the filler text for Spanish. I assumed the names of the templates where in Spanish in the template selection window.