What worries Chris Hemsworth?

"Thor" star Chris Hemsworth worries that his wife and children will backbite about him in future.

The 31-year-old, who has two-year-old daughter India and twin boys Sasha and Tristan, 11 months, with his wife Elsa Pataky, is worried his family will talk about him behind his back in Spanish as the children are learning their mother's native language, reports femalefirst.co.uk.

"Bad luck for me: I don't speak two languages. I'm afraid my wife and my kids will backbite about me in Spanish one day and I will have no clue what they are (saying)," Glamour magazine quoted Hemsworth as saying.

Despite his worries, he is currently enjoying travelling around the world with his family but realises things will have to change once his daughter reaches five or six years of age.

"As long as the kids are so young and don't have to go to school, it's not difficult to travel with them. We've been a few months in London, then America, now in Australia again.

"For us, it's fun to travel around. When my daughter goes to kindergarten, we'll have to organise it differently. Then we need a real home base," he said.

Hemsworth will reprise his role as Thor in the upcoming superhero film "Avengers: Age of Ultron", which is slated to release on May 1.