

Click on the language and then on "Set as default".Click on "Add a language" and select the language that you want Windows 10 to use.The process is not straightforward, however:

You may use Region & Language settings to change the Windows 10 interface language to another language. The link under related settings leads to the classic time, date and regional Control Panel applet. You may download handwriting and speech data, and set a different keyboard layout as well. A click on an added language and the selection of options displays these components on a new page. In addition to adding languages to Windows 10, you may download optional components on top of that. These languages may be set as the default system language. You may add new languages to the operating system depending on the version of Windows that is installed on the computer. The setting affects Windows Store and some apps among other things. Windows and apps may or may not use the selected region to deliver local content. The region & language Settings menu enables you to change the country or region, and to add, set or remove languages from the system. The second the "additional clocks" preferences of the Control Panel. The first, "additional data, time & regional settings" opens the "Clock, Language and Region" control panel applet. In addition, you find two links under related settings. Here you can switch between 12-hour and 24-hour formats for instance (the tt at the end indicates 12 hour formats). Allows you to adjust the formats displayed on the Date & Time page. Displays the following formats: first day of the week, short date, long date, short time, long time. Option to show more calendars in the taskbar automatically.
