¡Hola dobasda!
I believe you have to stick to the letters a-z in the English alphabet when editing a php file (Even if php was conceived by a Dane, born in Greenland (and now a Canadian citizen) I am pretty sure you can’t even use the Danish letters æ, ø or å).
In some templates (it may not be the case with Zeolite II) you can do this particular translation in the template manager. Your safest bet is the Spanish language folder though, and if you find it there and your translation doesn’t stick your last resort is to translate the phrase in the English language file.
Best of luck!
Steinar
