Breton

Breton is spoken in the Bretagne (France). 
It's a Celtic language, like Welsh.

Sprachprofi File: Breton-English 

Sentences for Travellers

Phrases

Grammar

Course (with Audio)  

Online dictionary

Professional (paid) translations from/to Breton 

Resources for offline learning:
Breton-English-Breton dictionary and phrasebook
A beginner's course in Breton
A grammar of modern Breton
More...
Breton  products from worldlanguage.com

Misc:
Short stories