A linguistic minority is the one who is present in small groups in a state. They are suppressed by dominating linguistic powers on the basis of their language and culture. Many a times they also face discriminations based on Castes, Creed and language.
They can keep their language intact by the following measures :
The populace starts writing more books in their language or publishing newspaper in it. Talking to each other in their language. Keep organising various programs to circulate it. By requesting shows on TV and radio. Education should be provided for their native language. They can organise social gatherings with the members of their communities do as to keep their own culture alive and they don't feel isolated.