Languages in my Polar M400
Your Polar device is delivered with English only, but you can add other languages from the Flow web service. When taking your Polar device into use with the Flow web service, you can add another language during the setup. The languages you can choose are: Bahasa Indonesia, Čeština, Dansk, Deutsch, English, Español, Français, Italiano, 日本語, Nederlands, Norsk, Polski, Português, 简体中文, Русский, Suomi, Svenska or Türkçe.
How do I add a new language to my Polar device?
To add another language later, go to polar.com/flow and sign in. Click your name/profile photo in the upper right corner, choose Products, and then Settings. Choose the language you want from the list, and sync with your Polar device.