Change MonoDevelop c# compiler output language

Hi!

How can I change the language of c# compiler errors in MonoDevelop. The compiler errors in Unity are shown in English, which I prefer, but in MonoDevelop it’s all German. I allready tried the solution given here: .net - How do I change the language of the Microsoft C# compiler's error messages? - Stack Overflow but I have sooo much Version subdirectories and I cannot figure it out. Please help!

I’m running Unity on a Win7 x64 Notebook.

Except that you want to change it from german to english, but same procedure.

Start > Control Panel > Clock, language and region > Change Keyboards or other input methods > Administrative > Change system locale