The deaf community and the available aids

The most deaf people grow up being the only deaf people in their family, and they have only few possibilities of connecting with others like them even in the larger settlements.
Sign languages are rare, because the deaf have few possibilities of connecting with each other, and showing their disability that visibly by signing in public is considered to be embarassing. Many deaf people use simple home signs. Some higher class people are taught to communicate by reading and writing, which is a huge aid for their involvement in the society. However, by far the most of the population of Salan are illiterate.

An illustrative life story

Sabaš Burwiš-Gwar was a first-born son to a Zeribian family of lower nobility. He was discovered to be deaf after he never learned to speak. He spend the most of his childhood locked into his family home, because his parents were embarassed by his disability, and was only allowed outside when his parents could superwise him, so he wouldn't "act weirdly".

When he was five, he was gifted his personal slave, Fin, who was tasked with teaching him to read and write. Fin had previously served their relative, who had become deaf by old age. By that, Sabaš had learned good lip-reading skills and invented some home signs that helped him to communicate, but the others had refused to sign with him. Sabaš turned out to be a quick learner and had a burning curiosity of the outside world. After learning how to read, he spend the most of his time doing that. Even though Sabaš didn't really know any other deaf people, his sign language grew fast between the two of them. He could also travel more freely with Fin, and used him as his voice.
As a young adult, he managed to get accepted as a scholar in the Grand Temple of Idûrfeš, despite his parents being against it. During the Revolution he was forced to participate in the battles, and became a well-liked general due to his wisdom, despite the discrimination he was facing from the other nobles. After the revolution he returned to his studies, and was rarely in contact with anyone else than his fellow scholars. However, he had a habit of taking young deaf people his apprentices, and passing his language to them.

Situation of the disabled people on Salan

It is very common to abandon children who are born with disabilities, and it is generally accepted by the community if the family is poor. Disabilities are thought to be curses from the gods, that show that the family has done something wrong. Many disabled children and family members are kept inside, out of the view of the neighbors.
There are very few affective physical aids available for the people with disabilities. The most helpful thing for the most, is that large families usually live together, and help each other. The wealthy can also get a personal slave or a servant to assist them.

Disabilities and Religion

Praying to the gods might be helpful. The most faithful have had (allegedly) even limbs grow back. But the gods don't really care about people born with their disabilities, who haven't proven themselves to be worth their interest.
An exeption is The One-Handed (deity) who is not promising a cure for the disabilities, but a community and understanding, and for this reason she is a very popular deity among the disabled.