🚀 go-pugleaf

I would like a little help with this problem.
I am running a 
GNU Emacs 18.55.1 of Tue Mar  6 1990 on lage (berkeley-unix)
on a Sun3/50. The emacs is not modified in any way for use with 8 char
ascii (ISO_????).

I sometimes write texts (letters, postings and manuals) in Swedish.
Swedish has extra 3 letters which normally are represented by 
lowercase: } { | 
uppercase: ] [ \

Is there a way to get Capitalize/UPCASE/downcase,
(let ((completion-ignore-case t))
   (try-completion ...)
   (all-completions ...))
and
(let ((case-fold-search t))
   (search-.......  ......))
To work correctly without having to rewrite them.
(Especially try-completion and all-completions is interesting since
these are written in c and rewriting them will make them slower.)

Is there a way to declare the syntax-table for this mode to contain
the upper/lower-case version of the char?

Do I have to recompile with patched version of isalpha?
--
	/Linus
*****	Wherever I exec my `which emacs`, is my $HOME.	*****
Linus Tolke				SM7OUU, linus@lysator.liu.se
Student at the				member of SK5EU LiTHSA
Link|ping institute of technology, LiTH	LiTH S{ndare Amat|rer (Ham-club)