Verb conjugation of "prevalere" in Italian

I like to watch TV at night before going to bed. Sometimes it is important to me to do something senseless. If I'd read a book I would need to concentrate and my brain would be focused on a specific topic. I sometimes do not want that.
I've also looked at the interface, and found it a good idea to include the colloquial option. Would it be very complicated to add the most important regional check box, like Spain, South America or Central America?
First, let me thank you for your answer. And how can I support you further? I'd be very happy about it if we could both help in each other in learning Spanish. 'Tandem' learning beats all other methods.