I didn’t know about this until a fellow translator pointed it out. I am not sure if this was from before WordPress 3.9, but if you helped translate WordPress in your own language, your name will be placed on the WordPress credits screen.
I maintain Bengali translation site of WordPress and I am validator. When you change the WordPress language to
bn_BD or your native language code, translators for that language will be shown there at http://yoursite.com/wp-admin/credits.php.