1. Offline models: Yes that is on the roadmap. There is a big demand for them especially in interactive educational use-cases.

2. Urdu and Modern Hindi can be cross understood in spoken form. The authentic Hindi is much different though and I can't understand the press releases that are done in super authentic Hindi. The writing systems in Urdu and Hindi is completely different too, so even if there is a great TTS system in Hindi, I cant use it. Accent are very different too.

Scripts: ہیلو हेलो