How this works is that it gives you the shortcode [current_language id='[wpv-post-id]' part='display_name'] this should give you the correct information.
Also you can add the code for the shortcode in the toolset custom code section under Toolset -> Settings -> Custom Code.
This support ticket is created 5 years, 8 months ago. There's a good chance that you are reading advice that it now obsolete.
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How this works is that it gives you the shortcode [current_language id='[wpv-post-id]' part='display_name'] this should give you the correct information.
Also you can add the code for the shortcode in the toolset custom code section under Toolset -> Settings -> Custom Code.
For this particular question I would recommend getting in touch with the WPML team since they should have a better knowledge of the right function to use to get this.