I have to use links within this format: http://site.com/index (or /index-blahblah or /index1 or /index1-blahblah )

where blahblah can contain any UTF 8 character

I authored the rule below however it does not work....help!

AddDefaultCharset UTF-8 
RewriteRule ^/?(index|index1)-?(.*)$ main.php?page=$1&keyword=$2 [NC,B,L]

It will work basically put a variety ...although not with '.'

RewriteRule ^/?(index|index1)-*([A-Z]*)$ main.php?page=$1&keyword=$2 [NC,B,L]

domain.com/category-title/ to domain.com/groups.php?title=category-title

RewriteRule ^([A-Za-z0-9-]+)/?$ groups.php?title=$1 [L]

I believe this situation may help.