If you have installed more than one language, you can change the language for the spell check, hyphenation and thesaurus at any time.
To change the language, you have the following options:
Usually, it is sufficient to set the default language with the ribbon command File | Options  . The spell check, hyphenation and thesaurus are usually always based on the default language. |
▪Formatting text in another language
If necessary, you can format sections of text in another language at any time via the dialog box of the ribbon tab Home | group Character  (even faster: Click on the Current language field in the status bar). |
More specifically: The whole document is formatted in the Default language by default. Thus the spell check, hyphenation and thesaurus use the default language specified in the settings. If you format a section of text in another language (for example, in Spanish), however, the spell check, hyphenation and thesaurus are based on the Spanish language for this section.
For more information, see the following pages.