Office Timeline allows you to change the language of your timeband and dates for communications with an international audience. The steps below explain how to use the add-in’s localization settings.
From your timeline slide, select the timeband and then open the Timeline Scale section you will see in the Style Pane on the right.
In the Timeline Scale section, click on the Language dropdown menu to set your preference. The add-in will automatically change the language of all dates on your timeline. In addition, the task duration counts and Today marker will also be translated.