This study examined how language, sacred memory, and inherited religious practices interact in transmitting religious heritage across contemporary African communities, focusing on how spoken expression, culturally embedded sound patterns, historical narratives, and ritual accounts sustain and reinterpret inherited religious knowledge amid generational change, formal education, religious transformation, and expanding digital communication. A cross-sectional survey was conducted among students, teachers, religious participants, cultural practitioners, and community members in Nigeria; of 490 questionnaires administered, 452 valid responses were analyzed (92.2% usable response rate). Data, gathered via structured questionnaire, were examined using descriptive statistics and Pearson correlation. Findings revealed a significant positive relationship between engagement with indigenous religious narratives and awareness of religious historical knowledge (r = 0.57, p < 0.001); familiarity with culturally embedded speech, chants, and prayers was positively associated with perceptions of religious heritage continuity (r = 0.62, p < 0.001); and participation in community-based religious and cultural practices was significantly related to perceptions of intergenerational transmission of religious knowledge (r = 0.55, p < 0.001). The findings indicate that religious heritage persists not solely through written records or institutional instruction but through recurring acts of speaking, listening, remembering, performing, and interpreting. The study concludes that the living forms through which sacred knowledge is expressed constitute vital channels of historical continuity and cultural meaning, recommending community-based documentation, culturally grounded learning, and intergenerational programmes that recognize oral and expressive traditions as resources for sustaining African religious heritage.