Hernadez, who is the club's record signing after joining from Valencia in the summer, has impressed in recent weeks for Michael Laudrup's side.
The Spaniard has quickly established himself as a key player in the Swansea side and the skilful playmaker admits he is enjoying life in England's top flight.
"I like this football," said Hernandez. "The Premier League is different to Spain, a bit more physical but I am enjoying it here.
"Swansea is a good team for me, the philosophy of the manager is good for my style and the other players have a good relationship with me. We are all happy and playing good football."