This seems like a straightforward question, but it’s not. The Inuit Language is spoken across the Arctic region of North America from Alaska in the west to Kalaallit Nunaat (Greenland) in the east. It might best be understood as a spectrum of dialects that vary enormously from one end of the Arctic to the other. In Alaska, the language is know as Iñupiaq; in Canada it is called Inuvialuktun in the Northwest Territories, Inuktut in Nunavut and Inuttitut in Arctic Quebec and the Nunatsiavut region of Labrador; in Greenland, the Inuit Language is known as Kalaallisut. Across the vast Inuit homeland, communities close to one another generally have few problems communicating between dialects, whereas an Alaskan and a Greenlander would have trouble doing so.
Even among communities that share a common dialect, vocabulary and pronunciation vary from place to place and between generations. Historically, Inuit lived in isolated camps where distinct speech forms evolved. As they settled into permanent communities, speakers of varying dialects often became neighbours in the same hamlet. This mixing has intensified with the modern-day migration of Inuit in search of employment and opportunities in other communities.
Daily life helps break down communication barriers. So, too, does radio and digital media by exposing Inuktut speakers to a range of dialects spoken throughout the Arctic.