This study investigated the role of indigenous languages in development communication within Cross River State, Nigeria, a region characterised by rich linguistic diversity, with communities speaking Efik, Ejagham, Bekwarra, and Yakurr. These languages are not only central to the people’s cultural identity but also serve as essential instruments for effective participation in development initiatives. Grounded in the Participatory Communication theory, which emphasises horizontal communication. A survey research design was adopted to provide an in-depth understanding of language use in development communication. Data were collected through interviews with development practitioners, local government officials, and community leaders across the four linguistic zones of the state. Data were thematically analysed and presented descriptively. Findings revealed that indigenous languages are crucial for effective message delivery, comprehension and community participation in development programmes. When development information is communicated in Efik, Ejagham, Yakurr, or Bekwarra, local populations demonstrate greater interest, trust, and behavioural response. The researchers recommended that government and development agencies institutionalise the use of indigenous languages in all community-based programme.