This study investigates the integration of dialectal features into official Czech toponyms, with a particular focus on street names and non settlement names. It explores how dialectal elements persist in official naming practices despite standardization efforts, especially in regions with strong dialect traditions. The authors analyze the linguistic and administrative processes behind toponym standardization and highlight the discrepancies between different mapping platforms – namely the state-run Geoprohlížeč and the commercial mapy.com. While street names are regulated and recorded in the national database (RÚIAN), non-settlement names lack centralized oversight, resulting in greater variability. The paper identifies specific phonological and morphological dialectal features that appear in official names, often due to the direct adoption of local spoken forms. The authors argue for a balanced approach to standardization that respects both linguistic norms and regional identity, emphasizing the cultural and communicative significance of toponyms in public space.