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All together against hate: ensemble based LLMs for multi class hate speech classification in the football context

  • Guto Leoni Santos
  • , Vitor Gaboardi dos Santos
  • , Colm Kearns
  • , Gary Sinclair
  • , Jack Black
  • , Mark Doidge
  • , Thomas Fletcher
  • , Daniel Kilvington
  • , Katie Liston
  • , Patricia Endo
  • , Theo Lynn

Research output: Contribution to journal › Article › peer-review

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Abstract

The rise of social media platforms like Twitter has transformed communication, fostering community engagement and knowledge sharing across diverse groups. However, it has also provided a stage for toxic content, including hate speech, which can manifest in harmful ways within specific contexts, such as discussions surrounding football. Hate speech in this domain often targets individuals or groups based on attributes such as race, ethnicity, or nationality, and is exacerbated by the emotionally charged nature of sports discourse. While binary classification models have traditionally been employed to detect hate speech, they struggle to address nuanced and context-specific forms of abuse, including micro aggressions and intersectional hate speech. Multi-class classification enables a more detailed understanding by distinguishing between various types of hate speech, but these models face challenges such as lexico-semantic variability and rapidly evolving norms within the football community. In this paper, we propose an ensemble technique leveraging BERT-based transformers to improve hate speech detection in football-related discussions on Twitter. Our method integrates manually-annotated datasets and multiple classifiers within ensemble frameworks to enhance accuracy and robustness. The results demonstrate that our approach significantly improves the identification of diverse forms of hate speech in the football context, contributing to more effective content moderation and fostering safer online communities.
Original languageEnglish
Article number53
Pages (from-to)1-24
Number of pages24
JournalJournal of Big Data
Volume13
Issue number1
Early online date25 Feb 2026
DOIs
Publication statusPublished (in print/issue) - 31 Mar 2026

Bibliographical note

© The Author(s) 2026.

Data Availability Statement

Information on access to data is provided within the manuscript.

Funding

The research in this paper was partially funded by the UK Arts and Humanities Research Council and the Irish Research Council (Grant Number AH/W001624/1) and the Federation Internationale de l’Automobile.

FundersFunder number
Arts and Humanities Research Council
Irish Research CouncilAH/W001624/1

    UN SDGs

    This output contributes to the following UN Sustainable Development Goals (SDGs)

    1. SDG 9 - Industry, Innovation, and Infrastructure
      SDG 9 Industry, Innovation, and Infrastructure

    Keywords

    • football
    • hate speech detection
    • Large Language Models (LLMs)
    • online hate
    • ensemble methods
    • Multi-class classification
    • BERT
    • Euros
    • Hate speech detection
    • Ensemble methods

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