Thanks for the quick response.
As you suggested EditDistanceProvider is resolving our issue.
Currently default radspell check provider (TelerikProvider) is in use in our product and this product is in use by various customers with different languages from past couple of years. I would like to know the impact on performance, testing and use cases for different languages if I change the provider from default to EditDistanceProvider.
Once again thanks for the inputs on this issue.