Allowing audio files with pronunciaton asks the ability to embed audio of pronunciations. While the question was specifically asked for the Russian site, I'm sure such functionality would be useful on all the language sites.
Can an embedded audio player be added to Audio.SE and Music.SE? was asked in 2010, requesting an embedded audio player functionality be added to audio.SE and music.SE. That question has been tagged status-completed, which means the functionality already exists within the SE.
Would it be possible to extend this functionality to language sites and, specifically, russian.SE?