EU approval still pending. The Diccionario de la desinformación is a comprehensive educational resource designed to help the public navigate the complexities of the post-truth era. Created through the IberCHECK project and co-funded by the European Union, this guide is the result of a collaboration between prominent media outlets and fact-checking organizations like Newtral and Público. The text serves as an alphabetical glossary that defines technical terminology related to digital manipulation and false narratives. Key entries include explanations of bots, astroturfing, and reverse image searches to provide readers with the practical tools needed to verify information. Ultimately, the publication aims to strengthen democratic society by promoting higher levels of media literacy among citizens. This 2026 guide provides clear, expert-backed definitions to ensure users can identify and combat misinformation effectively.