Re mapbox styles: offline styles are determined in OSM Scout Server and can be tuned as we please. Its just easier to learn using Mapbox environment. After learning, we can proceed and look what has to be adjusted in the server styles to make it possible. But I would prefer somebody who is interested in improving the styles to step up and make an effort to learn and compose them. TTS: In general, I think its not Pure Maps responsibility to somehow mingle a correct sentences or words. TTS should be smart enough to speak properly. I will look into hooking some advanced TTS, but would be great is someone would look through available options. https://responsivevoice.org/api/ seems to be for JavaScript. We are looking for an API where you would give a text, language and would receive MP3 or similar as a response.