How to process JSON recursively?

Question

JavaScript

There is JSON received by AJAX'om. Then it is inserted into the right places with the help of a template engine. The problem is this - the site is multilingual and some data comes by keys of the form name_ru , name_en , desc_ru , desc_en ...
Actually, the task before inserting data must first be filtered, receiving data with the keys name , desc ... In a flat form, I sort of managed , but the problem is that json can be multidimensional and there was a gag with recursion ...
https://jsfiddle.net/xk27kq7p/
in principle, children can also have children (oddly enough :)