To translate custom post type slugs using WPML plugin you need to follow steps below:
1Go to Main Dashboard Menu > WPML > Translation Management.
2Locate the Custom Posts Slug Translation Options checkbox and enable it.
3Locate the Custom Post Type you want to translate the slug of, on the same page.
For example: Portfolios.
4Enable the Use Different slugs in different languages for the custom post type option.
In our case portfolios.
5Input boxes will appear to enter a slug for each language for the custom post type.
Translating Custom Post Type Slugs is a feature which is part of the WPML plugin and not Jupiter theme. Our developers followed the instructions WPML developers gave them. The procedure is done in the theme code and the rest is handled by the plugin itself. That is why we encourage our customers to follow up their questions with Plugin Developers. Our support staff also will do their best to give correct instruction about translating custom post type slugs.