A Two-Stage LLM Framework for Accessible and Verified XAI Explanations. - Georgios Mermigkis; Dimitris Metaxakis; Marios Tyrovolas; Argiris Sofotasios; Nikolaos Avgeris; Panagiotis Hadjidoukas; Chrysostomos D. Stylios (CoRR, 2026)