This study aims to analyze language errors in President Jokowi's speech at the Gerindra Party Cadre Assembly. Using a qualitative descriptive method, the research examines language use from phonological, morphological, syntactic, and semantic aspects. The data source is a speech video uploaded by the Metro TV YouTube account. Data collection used observation methods with note-taking techniques. The research findings reveal various language errors, including phoneme errors, use of non-standard words, pronunciation mistakes, morphological errors in prefix, suffix, and confix usage, as well as syntactic and semantic errors. Nevertheless, the speech remains comprehensible, demonstrating relatively good communication skills.