proper noun/aʁ.l(ə).syʁ.tɛʃ/
Arles-sur-Tech is masculine or feminine depending on context in French.
Arles-sur-Tech (a town and commune of Pyrénées-Orientales department, Occitania, France, historically part of Northern Catalonia)
Arles + sur + Tech. Previously Arles, from Catalan Arles.