Translation of ausbauen

Let's not forget how we started. We were writing each other very long messages and today we are both much more fluent in both languages. No book could have brought us that far. Cheers.
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?
If you want we can exchange our phone numbers, then we can communicate better. I can then correct your German pronunciation, and you can do the same for my Spanish. What do you think?