I was also disappointed in the available language options. Disney dubs all their movies into basically every language known to man. So I figured that on Disney+ they would have ALL the languages available, right? Why not? It should be fun to have access to obscure languages. But they actually have less language options than the DVDs.
As soon as I got Disney+ I wanted to watch the classic, vaulted animated movies in HD. I know I'm weird, but for me the French version of Lion King will always be The One True Version. I also like the Japanese version of Frozen, but I've only seen it on airplanes because the JPN version is hard to get on DVD. But no luck. So instead I rewatched Lion King SD version that I ripped from my DVD, through my Plex server. Hurray for progess.