The family of an Adelaide man detained in the United Arab Emirates for swearing at an official is frustrated that he is still waiting for a court hearing.

Former soldier Sun McKay was arrested at the Dubai airport late last month, after he was accused of swearing at an airport policeman.

Mr McKay could face a three-year jail sentence.

His father, Richard McKay, says his son is not under arrest but his passport has been confiscated and he is runnning out of money.

He says the wait is frustrating.

"We were obviously shocked and quite concerned and we still are concerned and our concern grows daily. The due process doesn't appear to be in progress," he said.

The Department of Foreign Affairs says Mr McKay also used insulting and inappropriate language towards consular staff soon after the airport incident.

The department says Mr McKay intially refused consular help, but has since requested assistance which will be provided.

The department says travellers are bound by the laws of the countries they visit and there is a limit to what the Australian Government can do.