The QuickHelp portal itself is only available in English. However, QuickHelp offers closed-captioning language support for any software titles related to Office 2013 or newer. This includes Windows 8 and Windows 10.
QuickHelp uses Microsoft Translator, which is a cloud service that supports 50 languages for text translation.
Microsoft may add new languages periodically. Once they are added by Microsoft, they need to be enabled in QuickHelp, as well. If you notice that a language supported by Microsoft Translator is not available in QuickHelp, please enter a support ticket here.
Enabling closed-captioning language support in QuickHelp is easy. Start by clicking the CC icon.
Then, choose the desired language by first, clicking the Settings icon > Captions > and then choosing your language.