Is it possible to convert data when accessing the phone book via Bluetooth?

Question

Android

I have never done mobile development, so the question may seem silly.
There is a Bluetooth module in the car that provides a hands-free function. On old machines, like my Opel, Cyrillic is not displayed, and the notebook is naturally on it. Actually, the question is whether it is possible to develop an application, instead of a certain regular one, or a layer that converted Cyrillic records in transliteration.
Those. I need data to be sent to the car Bluetooth module in Latin.
Theoretically, is it possible to make such an application for Windows Phone or android? What modules are needed for this? Maybe there is something similar?