CulturALL: Benchmarking Multilingual and Multicultural Competence of LLMs on Grounded Tasks. - Peiqin Lin; Chenyang Lyu; Wenjiang Luo; Haotian Ye; Md Mehrab Hossain; Chunlan Ma; Shaoxiong Ji; Younes Samih; Bo Zeng; Fan Jiang; Yuanbin Cao; Dilda Duisenbek; et al. (CoRR, 2026)