Do LLMs Use Cultural Knowledge Without Being Told? A Multilingual Evaluation of Implicit Pragmatic Adaptation. - Mehwish Nasim; Sanjeevan Selvaganapathy; Neel Ganapathi Sabhahit; Marie Griesbach; Pranav Bhandari; Janina Lütke Stockdiek; Lennart Schäpermeier; Usman Naseem; Christian Grimme (CoRR, 2026)