Change language in Outlook

Open up Outlook (1).

Click on the Filer (2).

Select Settings in the menu on the left (3).

Select Language in the menu on the left (4). Select another language under Select editing language (5) if you want to change spell check, grammar check, etc. Then click Use by default (6).

To change the language of tabs, buttons and other controls, select the appropriate language under Select display language > Language in user interface (7). Then select Use by default (8).

Click here OK (9) to save the changes.