Hi Juan,
As long as the number in your PBX is from ________ country, the number that's being dialed on your click2call button will also be the same number. That being said, as of right now we don't offer numbers from Spain.
If you look at the Special Dialing Codes list at the bottom of this pricing page you'll see the list of places we offer numbers from at this time:
https://www.ringroost.com/pricing.php
Let me know if you have any more questions.
Thanks,
RingRoost Support Team