Try entering “overtone singing” in other languages into a search engine. I have compiled over 50 translations. You will find videos and other treasures you would never have been able to find otherwise.
New creative developments of overtone singing are often not easy to find if you only search with the usual terms: Throat singing, overtone singing, khoomii, etc. According to Google, “throat singing” is the most searched term in this context, but treasures from France or Russia may be lost.
Do you know another translation? Then please put it in the comment below.
Bashkir 
ba:
Өзләү, Özläü, Uzlyau
Basque 
eu:
Kantu armoniko
Chakassic 
tut:
Khai
Chinese 
zh:
卡基拉
Danish 
da:
Strubesang, Overtonesang
Dutch 
nl:
Boventoonzang
German 
de:
Obertongesang, Obertonsingen, Kehlgesang, Kehlkopfgesang
English 
en:
Overtone singing, harmonic singing, harmonic chant, throat singing, diphonic singing, Tuvan singing
Estonian et:
Kõrilaul
et:Finnish 
fi:
Kurkkulaulu, yläsävellaulua
French 
fr:
Chant diphonique, Chant de gorge, Chant harmonique, Diphonie
Hebrew (Ivrit) 
he:
שירת צלילים עיליים
Italian 
it:
Canto armonico, Canto difonico, Diplofonie, Triplofonie
Japanese 
ja:
喉歌
Lithuanian 
lt:
Virštoninis dainavimas, Harmoninis dainavimas, Virštoninis giedojimas
Low saxon (Netherlands) nds-nl:
Strötsingen
Luxembourgish 
lb:
Baovetoeënzaank, Kaelzaank
Mongolian 
mn:
Хөөмэй, Transkriptionen: (ISO9) Höömej, (Duden) Chöömei, Chöömej, (Engl.) khöömei, khöömey, (auch verbreitet) khoomej, khöömej
Norwegian 
nn:
Strupesong, Strubesang, Overtonesang, Overtonesong
Polish 
pl:
Śpiew alikwotowy
Portuguese 
pt:
Canto difônico, Canto dos harmónicos
Russian 
ru:
Горловое пение
Swedish 
sv:
Strupsång, Övertonssång
Serbian 
sr:
Аликвотно певање
Serbo-Croatian sh:
Alikvotno pjevanje
Slovenian 
sl:
Alikvotno petje
Spanish 
es:
Canto difónico, Canto de armónicos, Canto de la garganta
Tatar 
tt:
Бугаз җырлавы
Czech 
cs:
Alikvotní zpěv, Hrdelní zpěv, Harmonický zpěv
Tuwinian 
tyv:
Хөөмей
Ukrainian 
uk:
Горловий спів
Vietnamese vi:
Hát Đồng Song Thanh (“singing with two simultaneous sounds”. Thanks to Tran Quang Hai)
Xhosa 
xh:
Umngqokolo
http://www.wikidata.org/wiki/Q691771?uselang=de
http://de.wikipedia.org/wiki/Kyrillisches_Alphabet#Mongolisch
Picture credits: http://upload.wikimedia.org/wikipedia/commons/b/b1/WorldMap-B_non-Frame.png
By www.demis.nl [Public domain], via Wikimedia Commons
In Vietnamese , it is said : HAT DONG SONG THANH , that means singing with two simultaneous sounds.
tran quang hai
Thank you, Tran Quang Hai. Good to see you here, your advise is always appreciated.