Apertus: Democratizing Open and Compliant LLMs for Global Language Environments. - Alejandro Hernández-Cano; Alexander Hägele; Allen Hao Huang; Angelika Romanou; Antoni-Joan Solergibert i Llaquet; Barna Pásztor; Bettina Messmer; Dhia Garbaya; Eduard Frank Durech; Ido Hakimi; Juan Garcia Giraldo; Mete Ismayilzada; et al. (ACL (1), 2026)