Why your RAG chatbot fails in Thai — and how to fix it

Why your RAG chatbot fails in Thai — and how to fix it A real-world walkthrough of how we built a customer service chatbot for a Thai e-commerce company — and the chunking problem nobody warns you about. When I started building a RAG (Retrieval-Augmented Generation) chatbot for a Thai e-commerce company, I made the same mistake every developer makes: I copied the LangChain quickstart example, set chunk_size=500 , and expected things to just work. They didn't. This is the story of why naive chunk