Our site spans across multiple languages (16 total), so the beginning of the url can contain 16 different subfolders. We have a subfolder beyond the lang/locale folder that has changed names so I am wondering how to redirect to the urls that involve the new subfolder name while also redirecting across the 16 different lang/locale subfolders?
Here is an example of the old and new urls:
Old urls:
www.something.com/en_US/product/family/parent/child.html www.something.com/ru_RU/product/family/parent/child/model.html
New urls:
www.something.com/en_US/product/family/parent/child2.html www.something.com/ru_RU/product/family/parent/child2/model.html
RewriteEngine On
RewriteRule ^([a-zA-Z]{2}_[a-zA-Z]{2})/product/family/parent/([\w_]+)\.html$ /${1}/product/family/parent/${2}2.html
RewriteRule ^([a-zA-Z]{2}_[a-zA-Z]{2})/product/family/parent/([\w_]+)/([\w_]+)\.html$ /${1}/product/family/parent/${2}2/${3}.html
This may work for you, assuming that you're literally wanting to rename child_folder to child_folder2 (bikes -> bikes2, barbies -> barbies2, etc).
If your goal is something more complicated (bikes -> bicycles, barbies -> dolls), that becomes something that needs to be handled through a server-side programming language, but htaccess can help. You can do something like
RewriteEngine On
RewriteRule ^([a-zA-Z]{2}_[a-zA-Z]{2})/product/family/parent/(child)\.html$ director.php?lang=${1}&old=${2}
But you should avoid doing this if a straight regex solution is appropriate because there's no need to involve both and increase the load on your server when one is already involved.