Forums Scripts & Popups Replace script

How would I make a script that replaces certain strings in whatever others write. Norwegian and swedish letters doesn't display correctly.
Any examples?

Rusty, Norway

Find the character number IE copy and paste it into your edit box now Ill pick ¿ Now lets find its charcter number
//echo -a $asc(¿)
191
let's say I want to replace with the normal question mark thats 63
Now on ^*:text:*:*: { echo -ti2 $target $replace($1-,$chr(191),$chr(63)) }
This is a very crude way of doing this but it works you can do multiple replaces in one thing like this
//echo -a 123456789
123456789
//echo -a $replace(123456789,1,$chr(63),5,$chr(63))
?234?6789
There are better ways but thats my 2 cents

But then every line appears twice?

^*:text:*:*:{ echo -mbflrti2 $target $+(<,$nick,>) $replace($1-,$chr(191),$chr(63)) | haltdef }

Added some extra /echo switches and the <nickname> to better mimic a normal message