> Exploring the problem further, I discovered that Slavic languages have a good overlap with the sounds found in Esperanto, especially vowel sounds. Better yet, many professional TTS engines have Polish voices.
There's a strong case to be made that Esperanto was designed to have the phonemic inventory of the dialect of its creator, an Eastern Polish dialect. See http://jbr.me.uk/ranto/index.html#01.
There's a strong case to be made that Esperanto was designed to have the phonemic inventory of the dialect of its creator, an Eastern Polish dialect. See http://jbr.me.uk/ranto/index.html#01.