This is interesting information for owners of the Xperia X2 that want to change the device language to Spanish, and for others who want to study a new ways to change it to other languages.
The people in a Spanish forum have managed to unbrand a Spanish Vodafone based X2 using a trick to foil SEUS: the way is aborting the phone custiomization process, and then, installing manually a lot of CABs. This method also is useful to change the language from Stock English to Stock Spanish MR1.
I've already tried on my English based X2 already Updated to MR1, and it worked. Now I have a Generic Spanish X2 with MR1 installed.
The curious thing is that, this Spanish Stock ROM is far more stable that the same R1BA024 in English. I've used the phone with the original MR1 English for a couple of days an it was a real mess. But, this Spanish ROM is a little faster and it hasn't give me so many problems. The phone is really more stable (not perfect, but nearly close).
This is the link (all credits goes to dreamcrawler):
The instructions are of course in Spanish.