Mod_rewrite for a folder

Hello, I need to alter the following.

I need this:
http://domain.com/categoria-producto/bandejas/plastico/

to redirect to:
http://domain.com/es/product-category/bandejas/plastico/

I have used mod_rewrite in .htaccess in the root directory:

RewriteRule ^/?es/categoria-producto/([a-z/.]+)$ product-category/$1 [R=301,L]

I am using this template: RewriteRule ^/?old([a-z/.]*)$ /new$1 [R=301,L]

but it fails. Any ideas?