There are many places to find music in multiple languages. While we all watch YouTube because of the variety of music posted there, and the fun videos, I urge you to seek out resources that have the music only, without a video or visual. While the videographer’s vision can sometimes increase the appeal for a song, it can also turn you off of an artist or song entirely, so try to evaluate music on its own aural terms as often as possible. I advocate buying recordings, because music is an art worth paying for, but libraries and the radio and streaming services—and going to concerts!—are ways to find music as well.
Your local college radio and public radio stations, and libraries
NPR’s New Sounds: https://www.newsounds.org/shows/soundcheck
The Library of Congress National Jukebox: http://www.loc.gov/jukebox/
The American Musicological Society’s list of musicological sites
The British Library’s Database of World and Traditional Music: https://sounds.bl.uk/World-and-traditional-music
Art Song Central: http://artsongcentral.com