Find in /lib/misc.lib.php a section with:
Code:
function SEOReplace($string)
and add there your replace "table" this way:
Code:
$string = str_replace('á', 'a', $string);
$string = str_replace('ä', 'a', $string);
$string = str_replace('Á', 'a', $string);
$string = str_replace('č', 'c', $string);
$string = str_replace('Č', 'c', $string);
... It works for me this way.
rewriting tags is harder, I think. I was only able to make rewrite of tags as a word, and as an URL at once. But I only need rewrite URLs... I didnt make it.