A Multimodal Analysis of Code-Switching and Prosody in Urban Nigerian English: Implications for Discourse Cohesion and Language Identity

Project Abstract

This study investigates the multimodal dynamics of code-switching and prosody in Urban Nigerian English (UNE) to understand how discourse cohesion and language identity are negotiated in multilingual urban settings. Drawing on a mixed-methods design, the research combines a large-scale corpus analysis of spontaneous speech from urban multilingual contexts with fine-grained phonetic-phonological examination of prosodic features (intonation, rhythm, pitch, tempo) and multimodal cues (gaze, gestures, facial expressions) captured through video recordings. The corpus comprises interviews, public discourse events, and social interactions among speakers who routinely navigate Nigerian English, Yoruba, Igbo, and Pidgin in everyday communication. Quantitative analysis identifies patterns of code-switching frequency, semantic-pragmatic functions (topic shift, stance-taking, enfrentar of stance), and prosodic alignment across languages, while qualitative discourse analysis elucidates the sociolinguistic motivations, identities, and power dynamics embedded in language choice. The study employs a multimodal coding scheme to capture alignment between code-switching points and prosodic contours, examining how pitch reset, intonational phrases, stress patterns, and tempo interact with language alternation to signal emphasis, solidarity, or in-group membership. Results indicate that code-switching in UNE is tightly coupled with prosodic re-organization switches often occur at boundary positions with corresponding prosodic resets that preserve discourse cohesion, and prosodic prominence is leveraged to maintain rhetorical structure across language boundaries. Multimodal cues, including gaze direction and hand gestures, augment the interpretive effects of code-switching by signaling socio-indexical meaning and alignment with interlocutors. The findings reveal that urban Nigerian speakers deploy nuanced prosodic stratification to hedge stance and manage face in ethnolinguisticly diverse interactions, thereby sustaining a malleable yet robust language identity that foregrounds hybridity rather than dichotomy. Theoretical contributions engage with models of discourse cohesion, stance theory, and sociolinguistic identity, proposing a framework that conceptualizes code-switching as a multimodal discourse strategy rather than a mere linguistic alternation. Practically, the research has implications for language education, speech technology, and intercultural communication, highlighting the need for tools that account for prosodic and multimodal cues in UNE for accurate speech recognition, language pedagogy, and cross-cultural pragmatics training. The study also discusses ethical considerations surrounding language documentation in urban communities and offers recommendations for inclusive language policy that recognizes urban multilingual repertoires as legitimate linguistic resources. Limitations include corpus representativeness constrained by urban heterogeneity and potential observer effects in video data, mitigated through triangulation with ethnographic notes and sensitivity to sociolinguistic contexts. Overall, the work advances understanding of how multimodal resources underpin code-switching and prosody in shaping discourse coherence and evolving language identities in Nigeria’s urban linguistic landscape.

Project Overview

What This Project Is About

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The project looks at how people switch between languages or varieties (code-switching) and how the rhythm and intonation of speech (prosody) work together in urban Nigerian English. It explores how these features affect how clear conversations are and how people express their identities in everyday talking.

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The Problem It Addresses

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Researchers know code-switching and prosody matter, but we don’t fully understand how they interact in fast, real-life conversations in Nigerian cities. This project fills that gap by showing how multimodal cues (sound, rhythm, face-to-face signals) influence message understanding and social belonging.

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Objectives of the Project

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1. Describe patterns of code-switching in urban Nigerian English.
2. Analyze how prosody accompanies code-switching to convey meaning or emphasis.
3. Assess how multimodal cues affect discourse cohesion.
4. Explore linkages between language style and speaker identity.
5. Provide practical implications for education and communication in multilingual settings.

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What You Will Do Step by Step

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1) Review basic literature on code-switching and prosody. 2) Collect audio recordings of spontaneous conversations in urban Nigerian settings. 3) Transcribe speech, noting language switches and intonation patterns. 4) Analyze prosodic features (pitch, rhythm) around switches. 5) Examine video cues like gestures and facial expressions. 6) Compare findings across age groups and contexts. 7) Discuss how these patterns support or hinder understanding. 8) Present findings with simple recommendations for practice.

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Expected Outcome

Anticipated results include a clear description of how code-switching and prosody interact, a framework for interpreting multimodal cues, and practical tips for teachers, media, and communicators working in multilingual urban Nigerian communities.