Experience Report: Implementing Machine Translation in a Regulated Industry

This paper presents lessons learned from implementing Machine Translation systems in the context of a global medical technology company.We describe system challenges, legal and security considerations, and the critical role of human-in-the-loop validation for quality assurance and responsible deployment.Furthermore, based on an experiment involving over 11,000 ranked translations, we report reviewer preferences for outputs from small and large language models under various prompting configurations, using a domain-specific dataset spanning five language pairs.