Examining Code-Switching and Pragmatic Competence in Multilingual Urban Speech: A Corpus-Based Analysis of Nigerian English and Yoruba Interactions

Project Abstract

This study investigates code-switching and pragmatic competence in multilingual urban speech, focusing on Nigerian English and Yoruba interactions to illuminate how bilingual speakers manage discourse, intention, and social meaning in real-world communication. Building on a corpus-based framework, the research draws on a sizable, ethically collected speech corpus from Lagos and Ibadan urban communities, comprising spontaneous conversations, interviews, and informal talk-in-interaction across diverse age, gender, and sociolinguistic backgrounds. The analysis combines quantitative coding of code-switching instances—language switching points, lexical and morpho-syntactic patterns, and discourse-functional contexts—with qualitative discourse analysis to uncover the pragmatics of switch motivations, alignment, footing, and stance-taking. A key objective is to model how pragmatic competence manifests through code-switching decisions in relation to communicative goals such as topic management, social solidarity, power negotiation, and indexical signaling of ethnicity and identity. The study employs established theoretical constructs in sociolinguistics, including Matrix Language Frame (MLF) theory,.Utilization of the Embedded Language Principle, and politeness/topicalization strategies, complemented by speech act theory to interpret intentionality behind switches. Methodologically, the corpus is annotated for language segments, code-switch boundaries, and pragmatic markers (politeness strategies, hedges, face-threatening acts, and implicatures). Advanced statistical methods, including mixed-effects regression and association measures, are used to examine the relationship between switch frequency, discourse type, and pragmatic outcomes, while qualitative Q-Analysis and conversation analysis identify patterns of turn-taking, repair, and footing adjustments in code-switched segments. The study also explores age and gender variations, urban language contact dynamics, and the influence of multilingual repertoire breadth on communicative efficiency and social perception. Findings are expected to reveal that code-switching in Nigerian English and Yoruba is strategically deployed to accomplish pragmatic aims, such as signaling solidarity within in-group conversations, elevating stance through language choice, and managing politeness and face needs in asymmetric social interactions. The results will contribute to refining theoretical models of multilingual pragmatics, offering empirical evidence on how bilingual speakers leverage language mixing to achieve communicative precision, persuasion, and social alignment in rapidly evolving urban linguistic landscapes. Implications extend to applied linguistics, including language education, translation and interpretation practices, and the development of natural language processing tools that accurately account for code-switching phenomena in Nigerian contexts. The study also provides a robust dataset and annotation framework that can support future cross-linguistic work on code-switching and pragmatic competence in other African language contact situations, thus enriching the global understanding of multilingual urban communication.

Project Overview

What This Project Is About

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The project looks at how people mix Nigerian English and Yoruba in everyday conversation, and how well speakers use language in different social situations. It uses actual speech from urban settings to see when and why people switch languages and how this affects understanding and social meaning.

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The Problem It Addresses

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Many multilingual communities blend languages in daily talk, but researchers don’t always know which parts of speech or context prompt switching, or how this affects clarity and relationships. This project fills that gap by linking language choices to practical communication goals.

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Objectives of the Project

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1. Identify common situations where code-switching occurs between Nigerian English and Yoruba.
2. Describe how switching supports or hinders clear communication.
3. Explain how listeners respond to language choices in different social contexts.
4. Provide a simple framework that students can use to analyze bilingual talk.

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What You Will Do Step by Step

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1) Collect short, natural speech samples from urban interactions such as markets, classrooms, and chats. 2) Transcribe the conversations in a straightforward way. 3) Mark where language switches happen and note the context. 4) Look for patterns in when switching helps or confuses listeners. 5) Summarize findings with clear examples and a simple explanation. 6) Reflect on what the results mean for bilingual communication.

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Expected Outcome

Expect a clear, practical set of observations about code-switching in Nigerian English and Yoruba, plus a user-friendly method for analyzing bilingual talk. The project should help educators and students understand everyday multilingual communication better.