A Google search might be a good place to start. I just did a few quick searches for things like "Chinese traditional song lyrics" and got these results:

Chinese Folk Lyrics:
https://lyricstranslate.com/en/chinese-folk-song-lyrics.html

Chinese Folk Song Lyrics:
http://www.chineselearner.com/songlyrics/folksongs.html

Top 10 Chinese Folk Songs:
http://www.chinawhisper.com/top-10-chinese-folk-songs/

Arabic Song Lyrics and Translations:
http://www.arabicmusictranslation.com/

Russian Folk Lyrics:
https://lyricstranslate.com/en/russkaya-narodnaya-lyrics.html