Quoting Michael Boehnisch (18-Aug-98 15:03:45):

>>Why does xterm not show/accept Umlaute?

> [..]

>>What can I do now to make them usable during normal operation (e.g.
>>when hitting Umlauts when sh/tcsh is running, with vi, ...)?

> tcsh has to be compiled with 8-Bit cleanness and Native Language
> System support options enabled.  You can check this by entering:

>     echo $version

> On the Sparc system I'm working right now I get the response:

> tcsh 6.07.02 (Astron) 1996-10-27 (sparc-sun-solaris) options
> 8b,nls,rh,nd

I get:

tcsh 6.07.02 (Astron) 1996-10-27 (m68k-motorola-NetBSD)
options 8b,nls,dl,al,rh

Since 8b and nls in in there, tcsh is able to do Umlaute. But
$LC_CTYPE has to be set to 'iso_8859_1', otherwise no Umlaute.

> Vi also uses NLS if I remember right.  Simply setting $LANG
> to "de" does the job for vi, too.

Here, it's sufficient to set LC_CTYPE. Setting $LANG to 'de' doesn't
do the job (neither when vi is started from sh, nor from tcsh).

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