Changing your language in Trello
Trello is currently available in over 20 languages:
English, Portuguese, French, Spanish, German, Finnish, Norwegian, Swedish, Russian, Polish, Hungarian, Ukrainian, Czech, Dutch, Italian, Turkish, Thai, Japanese, Traditional Chinese, Simplified Chinese and Vietnamese.
To switch language, log in to Trello, then go to the user profile menu in the top right corner of the page. Click on 'Change Language...' to choose your preferred language.
"Change Language" will show up in the current language, so if you're not sure which option to choose, it's the next-to-last item on the menu:
Switching language for our Trello mobile apps isn't currently an option. Trello will automatically use the language that you've selected as the system language for your device.