The main aims and objectives of this research were to identify the implications for
implementing the national policy on Education in multilingual countries with special
reference to the Nigeria situations. Theories of multilingualism and language planning
were discussed. Four research questions were formulated to guide the study. The
sample for the study consists of 200 respondents from ten purposively sampled schools
in the Nsukka Education Zone. The instrument used for the study was the
questionnaire. The data generated were analyzed using the mean of the responses of the
respondents. The result shows that there is no problem in the implementation of
language policy in a multilingual country like Nigeria. The result also shows that
multilingualism affects teaching and learning and general performance of students and
the educational system in Nigeria. Finally, the study identified that the use of mother
tongue/indigenous language should be chosen to enhance academic performances of
students and foster unity in Nigeria.