Install a language for Windows 

If a language is listed under Preferred languages but doesn't appear on the Windows display language list, you'll first need to install its language pack (if it's available).
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Select Start, Settings, Time & language, Language & region.
Choose a language from the Add a language list under Preferred languages, and then select Options.
Select Download from the Download language pack option.
After the language pack is installed, select Back.
Choose a language from the Windows display language menu.
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