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Vernacular AI Voice Agents in India: The Hinglish Code-Switching, Regional Dialect, and Tier-2 Expansion Guide for 2026

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The deepest technical guide to building and deploying vernacular AI voice agents in India. Covers Hinglish code-switching at the phonemic level, regional dialect handling (Tamil, Telugu, Kannada, Bengali, Marathi, Gujarati), Tier-2/Tier-3 connectivity challenges, accent normalization, and the exact STT/TTS/LLM stack required for production-grade vernacular AI calling at ₹6/min.