How We Built a Sub-200ms Multilingual Chat System Translating 100+ Languages with Our Own LLM

How We Built a Sub-200ms Multilingual Chat System Translating 100+ Languages with Our Own LLM A guest from Tokyo checks into a hotel in Istanbul. They want to ask about breakfast. The receptionist speaks Turkish and English. The guest writes in Japanese. For decades this meant confused gestures, dictionary apps, and often guests giving up entirely. We spent two years building the infrastructure to remove this friction completely. The result runs in production across 700+ hotels in 50+ countries,