Currently 1% of young Scots are learning the Celtic language of their country, compared to 7% in Ireland and 21% in Wales.

BBC: Glasgow & West Scotland

But a previous AHRC-funded project at CAWCS showed there was more than one Celtic language in pre-Roman Iberia - present day Spain and Portugal - but it remained an enigma as to how and when the Celts arrived there.

BBC: Celtic heritage: Project wins funding to explore origins

When completed, this tree had sprouted branches representing all the main language groups in modern Europe: Romance, Celtic, Germanic, Slavic and so on.

ECONOMIST: Computers and language

In all the Celtic fringes of the British Isles there are bitter memories of children being punished for speaking the wrong language.

ECONOMIST: Endangered languages