Fortriu was a Pictish kingdom recorded between the 4th and 10th centuries. It was traditionally believed to be located in and around Strathearn in central Scotland, but is more likely to have been based in the north, in the Moray and Easter Ross area. Fortriu is a term used by historians as it is not known what name its people used to refer to their polity. Historians also sometimes use the name synonymously with Pictland in general.

Pictish is an extinct Brittonic Celtic language spoken by the Picts, the people of eastern and northern Scotland from Late Antiquity to the Early Middle Ages. Virtually no direct attestations of Pictish remain, short of a limited number of geographical and personal names found on monuments and early medieval records in the area controlled by the kingdoms of the Picts. Such evidence, however, shows the language to be an Insular Celtic language related to the Brittonic language then spoken in most of the rest of Britain.