The settings to change language, region, time ... Now expand the Regional format option, and then click the Change formats button. Here you can change the date, the day of the week, the short ...

How to change Language on the Lock screen in Windows ... Here, click on the Copy settings button. You will now see a new window named, Welcome screen and new user account settings.

To change the Facebook language, click "Edit" on the right side ... Log into your Facebook account at Facebook.com. Click the menu button in the top right corner (it's three horizontal lines).

You should be sure though, before you do, that you know the language well enough to switch it back if you need to — remember, once you change it, every button will be in that language.