Lusitanian, an Indo-European language unaffiliated to any branch of the language family, is attested by five inscriptions, toponyms and theonyms, all from the first century AD. It was used in the south-west of the Iberian penninsula. There is no example of adjective valence.

Bibliography:

Untermann, Jürgen. 1997. Die tartessischen, keltiberischen und lusitanischen Inschriften. (Monumenta linguarum Hispanicarum, 4.) Wiesbaden: Reichert, 758pp.