Thank you, that reminds me of the tricks for being able to view youtube videos in your country you're not supposed to, it's so long ago I had time for that:/...

Anyway... We don't need that, I missed sth. on the download sites for ssdt (and ssms): When you scroll down the download page you'll find the chapter Available Languages and here - it seems - you can also download the English version.

Sorry for the low-level interrupt.