Hey Holger!

 HG> I don't see CP819 which is IBM's nomenclature for Latin 1

I see you corrected the above in your next reply.  However I am quoting and
replying to it just to demonstrate what I consider evidence and verification of
a claim.

From 'grep CP819 /usr/lib/gconv/gconv-modules';

  alias   CP819//                 ISO-8859-1//

which can be verified by a google search (other search engines could possibly
work as well);

  https://en.wikipedia.org/wiki/ISO/IEC_8859-1

which claims that CP819 is indeed an alias for ISO-8859-1 as well as
iso-ir-100, csISOLatin1, latin1, l1, and IBM819.  I don't see latin-1 or
LATIN-1 in either of those documents listed as an alias for ISO-8859-1.  I can
find more references for verification of the CP819 alias but absolutely none
for latin-1, LATIN-1 or even "Latin 1" for that matter.

 HG> Regarding CP1252, IBM lists it as Latin 1 Windows, again without any
 HG> hyphen.

According to https://en.wikipedia.org/wiki/Windows-1252 (and I qoute);

  It is known to Windows by the code page number 1252, and by the
  IANA-approved name "windows-1252".

which verifies /usr/lib/gconv/gconv-modules claim of;

  alias   WINDOWS-1252//          CP1252//

See how easy it is to come up with verifiable evidence for legitimate claims. 
Also while we're at it https://en.wikipedia.org/wiki/Windows-1252 also states
(again I quote);

  It is very common to mislabel Windows-1252 text with the charset
  label ISO-8859-1.

It seems that it is also easy to come up with references for wrongness in
certain cases.  ;-)

 HG> BP = Benny Pedersen.

Ah!  Yes I already noted that his msged grunges character sets which is why I
don't use it anymore.  I used to use it for fidonet messaging many years ago
but back then only used 7-bit ascii characters and NEVER the 8-bit ones over
dec 127 misidentified as so-called high ASCII or other misleading names usually
by IBM types.  The shame never ends with them does it?  :::sigh:::

 HG> Maybe, I won't argue, since I'm no linguistic expert.

Neither am I but I can search for suitable documents to act as evidence and/or
verification when needed.  So far no success finding any credible evidence for
LATIN-1 or latin-1 being a alias for ANY valid character set.  Can you?

 HG> Don't cry for me either, I have QEdit and TSE!

I used to like and use QEdit way back when.  The only version I used was the
original 16-bit DOS version back in the late 1980's or thereabouts.  Packed
with features for such a little program, around 40k if I recall correctly.

Life is good,
Maurice

... Don't cry for me I have vi.
--- GNU bash, version 4.4.0(1)-rc1 (x86_64-atom-linux-gnu)