Have you added in the videoscribe 3.1.0 the Bengali font? If not, please join the Bengali font now in the videoscribe 3.1.0.
Thanks for your feature request. We cannot enable Bengali font right now (if it were that easy we would have done it) but I have sent this as a feature request to the VideoScribe project manager and it will be considered for inclusion in a future release of VideoScribe.
Please also see Write with non-Western text characters for instructions on what to do if the language you would like to use is not supported by VideoScribe.