If you like Blackpool you'll love Benidorm. With so many places in the world to choose from I don't get why people go there :shrug:
Language and an English breakfast won't be a problem though.
Go to Ibiza and stay in Ibiza town, it's like a different planet to San Antonio. It's way more sophisticated but more expensive, but if you're still wearing Union Jack shorts and like to go around bare chested singing football songs as a group it may not be for you.