Linked from
The 22 pages that link to Celtic languages, each with the reason it gives.
Goidelic languagesNarrower topic: Goidelic is one of Celtic’s two surviving branches.
Cornish languageNarrower topic: Cornish is one member of this wider language family.
GaulsNarrower topic: Gaulish speech places the Gauls within the broader Celtic linguistic world.
WelshNarrower topic: This wider family places Welsh among languages with shared ancient ancestry.