Mundorgel (f)
(with) definite article: dieMouth organ (Southeast Asia)
This term, used by Schwörer, doesn’t occur in dictionaries, but the official translation (Mundharmonika) defines an entirely different, usually much smaller, instrument.
Schwörer, Gretel: Die Mundorgel bei den Laˇ Hu_ in Nord-Thailand: Bauweise, Funktion und Musik, 1: Darstellung. Hamburg, 1982, title & passim.