"This is our third signing of the past few days and again, I'm really pleased Zoltan has agreed to join us," Megson told the club's official website.
"He's the captain of Hungary, really enthusiastic and wants to prove himself in England.
"We're going to have to give him time to adjust to a different way of life and to learn the language but he will be given that time.
"Zoltan is an all-round midfielder who has an eye for getting forward. He's also quick, athletic and works hard.
"Hopefully, he will prove to be what we think he can be."