* Basque: Basque is a language isolate, meaning it is not known to be related to any other language in the world. It's a unique and ancient language spoken in the Basque Country, straddling the border of Spain and France.
* Inuktitut: Inuktitut belongs to the Eskimo-Aleut language family. This family also includes languages spoken in Greenland, Alaska, and Siberia.
* Welsh: Welsh is part of the Indo-European language family, specifically the Celtic branch. Within the Celtic branch, it's classified as a Brythonic language, along with Breton and Cornish.