NaijaS2ST: A Multi-Accent Benchmark for Speech-to-Speech Translation in Low-Resource Nigerian Languages. - Marie Maltais; Yejin Jeon; Min Ma; Shamsuddeen Hassan Muhammad; Idris Abdulmumin; Maryam Ibrahim Mukhtar; Daud Abolade; Joel Okepefi; Johnson Sewedo; David Ifeoluwa Adelani (CoRR, 2026)