Lots of ¨learn to surf, learn spanish¨ places in Costa Rica, especially around Jaco. Usually you will get 4 hours of spanish with a surf lesson in the afternoon with a couple hours of surf. Some include trips to waterfalls, etc. But they can be expensive.
Another alternative is to come to Costa Rica for 2-4 weeks or longer, take some surf lessons, take a week of spanish lessons and talk to everyone you can find. Cheaper, but not all packaged up.
IPAI in Jaco has private Spanish lessons for $15 per hour and you can rent a board here for $15 a day. Take a couple surf lessons, you are on your way.
Check the internet for surf and speak packages.