Sorry to hear about your daughter. I know how stressful this can be as my son also didn't speak until he was 3.5 years old. From my experience I can suggest that more speech and/or occupational therapy is a lot better option than sending her to Nepal. Note that the result of these therapy can take some time but you know your situation better than any of us.

FYI, I also took my Son to the place that Laamon suggested and it did not work.

Again, I hope everything works out well with your daughter.