Human beings use languages to communicate. The effor made to protect and conserve the environment recourse to languages. This is the case of radios of Bukavu town. They use languages such as French, Swahili and Mashi in the environmental broadcastings to communicate and educate people about how to preserve the environment. This study has revealed the impact of languages on the degree of understanding of environmental message broadcast though radios. The results show that the more broadcasting are broadcast in the languages well mastered by the population, the better the message conveyed is understood and assimilated. According to investigations, messages broadcast in the environmental broadcastings on the radios of Bukavu town are well listened to thanks to languages well-known buy the listeners. On average, 88, 8% of investigated people master the three languages used in the radio. We have used the investigations in the households of Bukavu town to collect the data. These investigations have been made on a sample of 2100 people belonging to these households. Therefore, the issues of communication environmental education are not found on the level of languages used for the broadcasting. They could be located elsewhere.