This paper is an attempt to considerably assess various language maintenance efforts in Nigeria using conceptual framework of literature search method with a view to understanding how far they help toward achieving sustainable educational development in the country. In essence, the paper investigates the meaning and nature of language maintenance as well as its different forms, and how the adopted types of language maintenance are contributing to the success or hindrance of achieving sustainable development educational development in Nigeria. The paper discovered that the efforts of language maintenance are less effective and that government and other relevant stakeholders need to do a lot to recover the lost glory and status of our indigenous languages in as much sustainable educational development is to be achieved in the country. The paper also made some useful conclusions, that in order to have effective language maintenance for sustainable educational development, the country should try to overcome fear of ethnic inferiority and superiority as it rejects change egalitarian participation in modern nation building. The paper further recommends that government as a major stakeholder in educational development needs to investigate the language use and patterns and attitudes of Nigerians as a means of determining factors that helped to maintain the indigenous languages.