I feel like I'm having a really hard time retaining any new vocabulary words because there are no audio files. Anyone else feel this way?
hey, yeah! the pitches and tones in navajo are really difficult to master. you can find loads of videos on youtube and bing videos about this: type 'navajo pronunciation' or 'navajo pitches & harder sounds'. they'll give you the basics of what each accent or letter combination is supposed to feel like. as for your question though, i completely understand what you mean- i hope that as navajo moves out of beta we can not only have more lessons but more audio files too. i don't know where it is on the priority of the duolingo team at the moment as additions to the navajo course are not very in-demand. good luck on your journey learning this beautiful language!! ♥