What does catalānus mean in Latin?

catalānus, a adjective, means “Catalan”.

How do you pronounce catalānus?

In classical Latin, [ka.taˈɫaː.nʊs]; in ecclesiastical (church) Latin, [ka.taˈlaː.nus].

adjectivefirst/second-declension adjective

catalānus (feminine catalāna, neuter catalānum)

Classical[ka.taˈɫaː.nʊs]Ecclesiastical[ka.taˈlaː.nus]

singular
form	masculine	feminine	neuter
nominative	catalānus	catalāna	catalānum
genitive	catalānī	catalānae	catalānī
dative	catalānō	catalānae	catalānō
accusative	catalānum	catalānam	catalānum
ablative	catalānō	catalānā	catalānō
vocative	catalāne	catalāna	catalānum

plural
form	masculine	feminine	neuter
nominative	catalānī	catalānae	catalāna
genitive	catalānōrum	catalānārum	catalānōrum
dative	catalānīs	catalānīs	catalānīs
accusative	catalānōs	catalānās	catalāna
ablative	catalānīs	catalānīs	catalānīs
vocative	catalānī	catalānae	catalāna

Medieval Latin; from the root of Catalunya.