Which language became Greenland’s sole official language in 2009?

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The Act on Greenland Self-Government, which took effect in 2009, established Kalaallisut (West Greenlandic) as Greenland’s sole official language.1

Kalaallisut is a dialect of the Inuit language, which belongs to the Eskimo-Aleut language family. Prior to the implementation of this act, Danish held the status of an official language alongside Greenlandic.12