changing tex in the code preview pane of LyX

[Wolfgang Engelmann]

I got a \foreignlanguage{english} error in the legend of a figure in a 
German version which was caused by a lyx-note inserted from the English 
version into the legend. This kind of error is difficult to find, but 
thanks to Herbert Voss who pointed me to the tex line I could eliminate it.
My question is, could I have done it also by eliminating it (i.e. 
\foreignlanguage{english}) directly in the tex code preview pane of the 
lyx document?

Wolfgang