To set your language on boards, select the gear icon next to your profile picture, then go to Set language to apply your language settings.
Language settings in Boards are independent from language settings in Channels.
To enable or disable random emoji icons for your board and cards, select the gear icon next to your profile picture, then toggle Random icons on or off.
If you skipped the product tour or want a refresher on Boards, you can restart the product tour by going to the gear icon next to your profile picture and selecting Product tour. This will add a new Welcome to Boards template to your sidebar and kick-off the guided onboarding tour.