Custom controls in customizer

Hey guys, I need some help.
I have a custom control in customizer which returns a json, something like this:
[{"icon_value":"fa-cogs","text":"Lorem ipsum dolor sit amet","title":"Translate","id":"llorix-one-lite_341241kq"}]
So, when I modify it I get something like this in Languages: https://prntscr.com/csxauc .
Is there any way to unregister this string and register its components?
Something like:

pll_unregister('ugly_json_string');
$decoded_json = json_decode($ugly_json_string,true);
foreach($decoded_json as $item){
pll_register_string($item['icon_value']);
pll_register_string($item['text']);
pll_register_string($item['title']);
}

Thanks!