We'll create fresh WordPress site with WP Slug Post Type Custom Language (Polylang) installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Change your internal URLs (Slug) of your custom Post Type to the desired language of the system.
Take the opportunity to change your internal URL (Slug) to your custom Post Type by linking to the desired language in the Polylang or WordPress system. Very easy!
This file is part of WP Slug Post Type Custom Language (Polylang).
WP Slug Post Type Custom Language (Polylang) is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published
by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
WP Slug Post Type Custom Language (Polylang) is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with WP Slug Post Type Custom Language (Polylang). If not, see http://www.gnu.org/licenses/.