Wretched, can't help with online sources, but in going through old school songbooks, a number can be found in them.
Music Highways and Byways, Silver Burdett, indexed in the schoolbook permathread, 69315, has a number of them, each with one verse in the original language.
Bulgarian- 1
Croatian- 3
Czech- 3
Greece- 2
Polish-3
Russian-2
Slovak-2
Ukrainian-4
Yugoslav-2

Others of these books, available very cheaply nowadays, have them, but I don't believe that they are identified in the indices in the Permathread.
School Permathread

I looked at a few online sources, but found Slovak songs, etc. without the English translation.