Magento2: Checkout Suite of IWD

I wanted to install the free version of this extension and try it.
But I saw that there is only one language version for the free version.
Does anyone know how I can create a file for my language and translate this module?

https://www.iwdagency.com/extensions/one-step-page-checkout.html

Magento 2.2 IWD Inepage Checkout Thumbnail in Summary

Looking to add a product thumbnail to the list in the cart summary. I'm not sure if this is easily done or not.

IWD Checkout extension does not work on proto theme

I have installed version 3.2.0 of IWD Checkout M2 in proto theme, it is giving some errors in the console. Please see the screenshot below and any help will be appreciated.

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