What programming language was Office 2011 for Mac written with? [closed]

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Closed 12 years ago.

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I was curious if it was written in objective C or possibly Microsoft was considering taking mono more seriously? Any .NET is office 2011 for mac?

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The same language as previous versions.

Wikipedia says C++ and Objective-C.

It would be insane for Microsoft to rewrite it from scratch in a new language.
(This is also why Office for Windows isn't written in C#)