An Acoustic and Pragmatic Analysis of Code-Switching in Urban Nigerian English: Predictors of Language Choice and Identity Construction

Project Abstract

This study investigates the acoustic and pragmatic dimensions of code-switching in urban Nigerian English, examining how social, contextual, and linguistic factors predict language choice and influence identity construction among multilingual speakers in Lagos and surrounding urban centers. Drawing on a mixed-methods design, the research combines sociolinguistic interviews, spontaneous speech elicitation, and an in-depth pragmatic analysis of conversational turn-taking, politeness strategies, and message framing across bilingual and multilingual speakers who routinely navigate Yoruba, Pidgin English, and Standard Nigerian English. Acoustic analyses focus on segmental and suprasegmental features, including consonantal timing, vowel quality, intonation contours, speech rate, and voice quality, to determine phonetic markers associated with code-switch triggers and speaker intention. Pragmatic coding examines illocutionary force, stance markers, deictic alignment, and discourse markers as potential facilitators or mitigators of switch points within naturalistic discourse. The study also integrates sociolinguistic variables such as age, gender, education, occupation, language proficiency, locale, and social network density to model predictors of code-switching frequency and code-switch selection, employing generalized linear mixed models to account for random effects at the speaker and context levels. A qualitative component uses discourse analysis to explore identity performance, prestige signaling, and solidarity-building through code-switch choices in peer groups, marketplaces, and institutional settings. Findings are expected to reveal robust correlations between code-switching and social indexing—where switches align with stance facilitation, in-group solidarity, and social aspiration—alongside nuanced acoustic signatures that correspond to shifts in perceived formality, authority, and closeness. The research aims to contribute to theoretical debates on continuum models of bilingualism versus discrete bilingual repertoires by demonstrating how fluid, context-sensitive switching operates across acoustic and pragmatic dimensions. Implications for language education policy, urban sociolinguistic planning, and communication technologies include the potential for improved pronunciation training that accommodates multilingual realities, the design of better natural language processing tools for Nigerian English varieties, and enhanced community-based language planning that respects speaker agency and identity. The study also discusses ethical considerations related to speaker anonymity, consent, and the sociocultural sensitivities surrounding language use in Nigeria’s diverse urban landscapes. By triangulating quantitative models with qualitative insights, the research provides a comprehensive portrait of how code-switching functions as a dynamic resource for social navigation, identity construction, and communicative efficiency in a multilingual urban ecosystem. The results are anticipated to advance understanding of the intersection between phonetics, pragmatics, and sociolinguistics in African urban settings, offering a framework applicable to comparable multilingual contexts across West Africa and beyond.

Project Overview

What This Project Is About

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A plain-language overview of the topic and what the project investigates.

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The Problem It Addresses

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What problem or gap this project tackles and why it matters to the field or society.

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Objectives of the Project

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1. Identify where and why speakers switch between Nigerian English and local languages.
2. Describe how sound and meaning change when code-switching happens.
3. Find patterns that predict when people choose one language over another.
4. Explain what these choices reveal about speaker identity and social context.
5. Suggest practical implications for education, media, and multilingual communication.

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What You Will Do Step by Step

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1. Review basic literature on code-switching and Nigerian English.
2. Design a simple data collection plan (e.g., interviews or everyday conversations).
3. Record short speech samples from diverse urban speakers.
4. Annotate data for language segments and context (where switching happens).
5. Analyze how pronunciation and word choice relate to context and speaker traits.
6. Identify common patterns of language use across situations.
7. Interpret findings in terms of social meaning and identity.
8. Prepare a clear report and presentation for a final year project.

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Expected Outcome

The project is expected to map when and why speakers switch languages, show how such switches affect meaning and identity, and offer insights for educators and communicators working in multilingual urban communities.