Element Loading Issue in backbone Form

I have an issue in loading elements with element ID in backbone js.

My requirement is loading pages with multiple languages. I have done javascript functions for that. And it works via button click event(onclick). But it won't work while I render the form-2 from form-1. I found, the issue is that loading elements with element ID. Because on the first loading of form-1 the form-2 elements are not loading.

While in form-2, it works successfully via button click event(onclick). I just want to render the form-2 from form-1 with the selected language.

Please help me to resolve this issue. Thanks in advance.