android – Flutter: Speech to textual content for a language that does not exist on mobiles however use Russian alphabits

I need to create a language educating app that makes use of speech recognition in some components, similar to Duolingo. The language would be the Chechen language, it makes use of the Russian alphabits, however the language shouldn’t be supported by programs. How can I make the app acknowledge the audio for an unsupported language? If including a language from skinny air is feasible, what would I’ve so as to add, add a complete dictionary, or simply map every phrase I am utilizing in my app with an audio file, so when somebody has to say one thing for a particular phrase, the app will examine his audio from mic with saved audio and see in the event that they match to offer him credit score if mentioned appropriately?