The head of the government's human and minority rights service, Petar Ladjevic, told the Belgrade-based Beta news agency that under the Constitution and relevant laws ethnic minorities were entitled to use their native language and that whether they would use it was up to them.
He added that minorities could request an interpreter and official documents written in their mother tongue.
Under the relevant law from 2002, this right belongs to those ethnic minorities which account for at least 2 percent of Serbia's population.
Unofficial reports show that representatives of ethnic Hungarians, Roma, Albanians, Bosniaks and Croats have won seats in the Serbian parliament in the parliamentary vote last Sunday.