RewriteCond %{QUERY_STRING} ^ru
RewriteRule ^(.*)$ http://somesite.com/$1%1/? [R=301,L]
RedirectMatch 301 http://somesite.com/ru(.*) http://somesite.com/$1
RewriteCond %{HTTP_HOST} ^somesite\.com$ [NC]
RewriteRule ^(.*)$ http://somesite.com/$1 [R=301,L]