Hispano-Celtic is a term for all forms of Celtic spoken in the Iberian Peninsula before the arrival of the Romans. In particular, it includes:A northeastern inland language attested at a relatively late date in the extensive corpus of Celtiberian. This variety, which Jordán Cólera proposed to name Northeastern Hispano-Celtic, has long been synonymous with the term Hispano-Celtic and is universally accepted as Celtic. A language in the northwest corner of the peninsula, with a northern and western boundary marked by the Atlantic Ocean, a southern boundary along the river Douro, and an eastern boundary marked by Oviedo, which Jordán Cólera has proposed to call Northwestern Hispano-Celtic, where there is a corpus of Latin inscriptions containing isolated words and sentences that are clearly Celtic.

Gallaecian or Northwestern Hispano-Celtic is an extinct Celtic language of the Hispano-Celtic group. It was spoken by the Gallaeci in the northwest of the Iberian Peninsula around the start of the 1st millennium. The region became the Roman province of Gallaecia, which is now divided between the Spanish regions of Galicia, western Asturias, the west of the Province of León, and the North Region in Portugal.