text underlined because of "language"

[NicoWinger]

Hello,
 
if I insert text from outside in my lyx-document, it's underlined because of
"language". Does s.b. know how to fix that? The problem is that if words of
a table for example are underlined like that, the indent of this row is
different to the other rows... 
 
s.b. an idea why?
 
Nico