If my phone is in English mode, how do I make Voice Dial use the Spanish mode?

Palm Pre 3 offers two languages upon boot/activation whatever it is called (sorry ) English or Spanish.

Although I am a native Spanish speaker, I prefer my interface in English. I hate translations because generally they are not accurate enough.

On the other hand, Spanish Language Voice dial (and text dictionary for messaging) would be of benefit for me. Even I laugh at myself pronouncing latin names in English for voice dial to work accurately (Itīs a riot! ).

I bet it should be possible to switch the interpretation engine from English to Spanish on the Voice Dialer. How could I do it? Where could I look information about it?

thanks