View Latin1 encoded file in a terminal with LANG set to de_DE.UTF-8

Hi,

I have a file encoded in Latin-1 (cp1252). When I open this file with 
Nano (from a terminal window in KDE) lots of characters are not 
displayed correctly), presumably because my system is set to UTF-8 
(environment variable LANG=de_DE.UTF-8). The Nano menus are displayed fine.

My first idea was to do a 'export LANG=de_DE@euro' before starting Nano. 
But then both the nano menus and the file are showing placeholder 
characters for German Umlaute an Spanish accents.

As you may guess from the problem description I am not an expert. Am I 
missing something? An encoding setting? Or is it a 'must' to have every 
file in UTF-8? Please help.

Jo