Sri Lanka, June 23 -- Now, 12 out of 19 workers at the Pizza Hut in Colombo 5, a nice little structure safely tucked away in a corner in Siripa Road, have a unique story to tell the world - they all have hearing impairments. And they are all happily employed.

Kengatharam Prakash has an infectious smile plastered on his face as he walks into work. Clad in a t-shirt, pants and a cap - all colour coded black and red - he looks sharp and eager. Holding his palm across his forehead he signed to his colleagues, and they smiled back.

Hailing from a village in Jaffna 20-year-old Prakash, not knowing Sinhala and others around him struggling to put two words in Tamil together, he connects to his co-workers with one universal language- sign.

Prak...