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SynHate: Detecting Hate Speech in Synthetic Deepfake Audio

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Abstract

The rise of deepfake audio and hate speech, powered by advanced text-to-speech, threatens online safety. We present SynHate, the first multilingual dataset for detecting hate speech in synthetic audio, spanning 37 languages. SynHate uses a novel four-class scheme: Real-normal, Real-hate, Fake-normal, and Fake-hate. Built from MuTox and ADIMA datasets, it captures diverse hate speech patterns globally and in India. We evaluate five leading self-supervised models (Whisper-small/medium, XLS-R, AST, mHuBERT), finding notable performance differences by language, with Whisper-small performing best overall. Cross-dataset generalization remains a challenge. By releasing SynHate and baseline code, we aim to advance robust, culturally sensitive, and multilingual solutions against synthetic hate speech. The dataset is available atthis https URL.

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@article{ranjan2025_2506.06772,
  title={ SynHate: Detecting Hate Speech in Synthetic Deepfake Audio },
  author={ Rishabh Ranjan and Kishan Pipariya and Mayank Vatsa and Richa Singh },
  journal={arXiv preprint arXiv:2506.06772},
  year={ 2025 }
}
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