Not sure if this is the right forum, but anyway...

 

I don't use Office Online very often, but just went to do so earlier and it appears that somehow my default display is set to Chinese language. Have checked my Microsoft account settings and location is definitely NZ. Also email and calendar are displaying just fine, it's just the Office Online apps that seem to be affected. Tried two different browsers, but same issue. A Google search was no help.

 

Anyone have any idea if this is a separate user controlled setting somewhere?