When the speech sounds of the soldiers are in German instead of English you most-likely installed the wrong version.
You need the
Stargate EaW - Final 1.3 (Complete version)
.
Check the
FAQ
on how to install it correctly.
But the 1.3 is far from perfect, it actually could a bug as well.
Please note that we do not develop the 1.3 actively anymore as we spent all our resources on
Pegasus Chronicles.