How to detect the language of MS Excel

I'm trying to figure out a way of detecting the language of an installed version of Excel (ideally from C++). I need this to resolve an issue with co开发者_运维问答mputers on which the language of Excel differs from the Windows language (see this problem).

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Using automation, the applications LanguageSettings object gives you that:

Application.LanguageSettings.LanguageID(msoLanguageIDUI)