Changing Masterlanguage in WebDynpro

Hi,

is it possible to change the masterlanguage of a WebDynpro project?

Unfortunatly I´ve created my project with masterlanguage english (default). Now I need to switch to german.

I´ve already changed all "en" entities to "de" in all .wd files of the folder /src/ and in the file .tssapinfo in the root folder of my project.

This does not have any effect. Where do I have to adjust the language?

Thx

Helmut