menu can not be translated when using with admin_menu_source module

I'm in developing of a multilingual website. I created a new menu for the webmaster role, by using the admin_menu_source module.
I need the menu can be translated, so enabled i18n_menu module.
Edit Menu, "Translation mode" set to "Translate and Localize".
OK, I add two link with the same path, like "admin/content".
and then with webmaster role landing site, switch languages.
However, admin_menu the language did't change.

In admin_menu.inc line 389,
You can see the array of key is a link path, thus leading to the same path only retains a link.