Galatian Share definition Flag The P-Celtic language spoken by the Galatae in ancient Galatia in modern Turkey. A Celt from Galatia. Galatian, Gaulish, Noric and Lepontic are P-Celtic languages. Galatian by GalaicoWarrior May 19, 2010 0 0 Get merch Get the Galatian mug. Buy Now — $32.95 See more merch