regex - .htaccess dash separator 2 params or more -

i'm working .htaccess, , want make friendly urls.

my current url:

www.url.com/index.php?v=[something]&i=[idiom] 

but can be:

www.url.com/index.php?v=[something] 

what want:

www.url.com/[something]-[idiom] 

or in second case:

www.url.com/[something] 

.htaccess config made:

rewriterule ^([^/]+)-([^/]+)?$ index.php?v=$1&i=$2 

writing www.url.com/[something]-[idiom] goes okay, webpage running properly. in second case have write www.url.com/[something]**-**. if write www.url.com/[something] page breaks.

so, want make second param optional, , separated dash if it's possible.

can 1 me please?

it won't match www.url.com/[something] because expects - @ end. include - inside second capturing group, so:

^([^/]+?)(-[^/]+)?$

also changed first greedy quantifier lazy 1 avoid matching much.