Multilingual Semantic Mediation Service is an applicationService within MyHealth@MyHands that provides cross-lingual semantic mediation for health data exchanged between EU Member States —translating clinical narrative, section headings, and patient-facing health summaries across the official EU languages while preserving the clinical meaning of coded data elements (SNOMED CT, LOINC, ICD codes are language-independent and are not translated). It serves the Mcont domain.