I would say yes. I have the experience of working with a number of individuals across the country. We had a meeting at Carleton University where we had speakers of Plains Cree and Innu, and we didn't have a common language because the Inuit speakers were bilingual with French, and the Plains Cree speakers were bilingual with English. They could understand a little bit between Plains Cree and Innu, but not sufficient.
On April 26th, 2018. See this statement in context.