arXiv Computation and Language By Minu Kim, Ji Sub Um, Hoirin Kim

Language Orthogonalization for Zero-Shot Cross-Lingual Audio Deepfake Detection

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The paper proposes a method called language orthogonalization to improve zero‑shot cross‑lingual audio deepfake detection. By removing language‑dependent variation from self‑supervised speech models using a target‑free ridge map on language‑identification embeddings, the approach consistently lowers equal error rates across six languages and six model backbones. The gains are larger when the target language is more distant in the language‑identification space.

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