Language is a regulatory requirement, not a courtesy
For medical devices sold in Europe, translation is written directly into the law. The Medical Device Regulation requires the information supplied with a device, the label and the instructions for use, to be provided in the language or languages determined by each member state where the device is made available. The In Vitro Diagnostic Regulation does the same for IVDs. In practice that means a genuinely European launch needs its user-facing documentation in most of the EU's official languages, and an incomplete language set simply blocks you from those markets.
What this means operationally
The language requirement follows the user, not the manufacturer. Several states accept English for devices used exclusively by healthcare professionals but insist on the national language the moment a layperson could use the device. Class does not exempt you: a Class I device has the same language obligations as a Class III implant. And the requirement extends beyond the IFU to labels, packaging text and the safety information that travels with the device.
Electronic IFUs
For defined categories of professional-use devices, EU rules allow instructions to be supplied electronically instead of on paper. eIFU changes the delivery format, not the language obligation, and it adds requirements of its own about availability and access. We translate and maintain eIFU content in the same versioned workflow as print, so the electronic and physical texts never drift apart.
The cost of getting it wrong
Mistranslated use instructions are a safety issue first and a commercial issue second: they surface in incident reports, complaints and corrective actions. Competent authorities treat the translated IFU as part of the device. It deserves the same engineering discipline as the device itself.