This study examined the various cultural factors hindering the mastery of English language in Kilifi County. A sample of 236 respondents representing Students, pupils, head teachers, teachers, parents, religious leaders, Pwani University Language specialists, Ministry of Education officers was drawn from Tezo Location. The proposed study was a descriptive survey, and both qualitative and quantitative data was collected by means of self administered questionnaires, Focus Group Discussions, and scheduled interviews. Qualitative data was analysed by thematic analysis while quantitative data was analysed by simple descriptive statistics and ranking by participatory methods. The study identified the cultural practices that hinder good mastery of English as frequent usage of Kiswahili and Mother Tongue when speaking at home, the declaration that English is a foreign language and the belief by the local community that speaking in English at home is a sign of pride and disrespect. Based on the findings, recommendations were made on how to promote good English mastery in Kenyan Schools.
Keywords: : Academic Performance, Kiswahili language, Language of Instruction, Mastery of English, Mother tongue, language of interaction
