Martin Auer asks about Yodeling all over the world. His finished film screened in Vienna, Austria on Oct. 4, 1998. Though Stimmhorn is from Switzerland, they don't really do alpine style. They're fairly avant-garde. Yodeling figures prominently in post-missionary Hawaiian music.
Some folks just refer to it as falsetto , but it's yodeling.
The Hawaiian language's use of glottal stops means that yodeling makes even more sense for that language. She does a traditional yodel tune on her album. Gordon Freitas does a Paniola Yodel . Review of Dhoondte Reh Jaaoge seems to confirm Indian yodeling. It's a sound that's like a jazzy version of Jimmie Rodgers' yodels.