Shell Programming and Scripting

Hello,
I was written a cgi with a textarea to save some words from web.
I grab and write words like this:

Code:

            
            $cgiparams{'CONTENTS'} =~ s/\r//g;
            #$cgiparams{'CONTENTS'} =~ s/á/á/g;
            open(TM, ">$editedfilename");
            #binmode(TM, ':utf8');
            flock TM, 2;
            print TM "$cgiparams{'CONTENTS'}";            
            close TM;

This is cool for english and persian words but nor on spanish or german language. spanish words lose out some of letters and persian words save on file like د & # 1 583
How I can save spanish and ... languages as unicode, like persian????
BestRegards.

CONTENTS is name of a textarea and cgiparams is a hash of html form's tags like button and text input etc. you can produce me an article ??