Cape Town - The National Institute for the Deaf (NID) has called for sign language to be recognised as one of the official languages in South Africa.

Sign language is said to be the fifth most used language in the country. More people use it compared to those who speak languages such as SiSwati, IsiNdebele and TshiVhenda.

The NID said that about four million South Africans had hearing difficulty, while 1.5 million were "profoundly deaf", with 93 percent of the deaf being unemployed.

This was revealed on Tuesday during public hearings on the South African Language Bill hosted by Parliament's Portfolio Committee on Arts and Culture.