Un experimento rápido: translating Cloudflare Stream captions with Workers AI

This document describes an experiment using Cloudflare Workers AI to translate VTT caption files from English to Spanish, revealing that translating full sentences (by merging caption cues at sentence boundaries) significantly improves quality over translating fragmented cues. It outlines the prototype’s approach, includes code snippets, presents before/after examples, and summarizes key takeaways such as the impact of source transcription quality and punctuation, the need for multilingual evaluation, and considerations for UI/API design and production readiness.