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A developer shares a postmortem of building a Hindi-English voice agent for fintech, highlighting challenges with number readback, code-mixed TTS, latency under load, and compliance. Key fix was choosing TTS with first-class support for Indian code-mixing and testing at real concurrency.
This paper evaluates forced alignment for Hindi-English code-mixed speech using the Montreal Forced Aligner, demonstrating that bootstrapping strategies and code-mixed training data achieve a tenfold improvement in alignment accuracy over monolingual alternatives.