Datapoint Sri Lankan Malay/Increasing use
Historically, the speech community has grown through intermarriage, primarily involving Moors (Shonam/Tamil-speaking Muslims), but also Sinhalese who convert to Islam. I cannot say to what extent this might currently be occurring in urban communities. In the village of Kirinda (400 households), however, where there is not much contact with Moors other than teachers and itinerant clerics, there are cases of young Sinhalese men becoming fluent Sri Lankan Malay speakers, either as a result of participation in friendship networks or marrying in and converting to Islam. I have recordings for both of these categories, but no statistics.
Values 
Slowly
- Confidence:
- Certain