How to add image to header that links to other site

I am providing my website in two languages, but rather than use a plugin like polylang, I want the English version and the Spanish version to be two entirely different websites.
I would like for there to be a small image of the relevant flag embedded in my header, so that users can click on it to be linked to the other website for their language.
Is there a way to do this?
Thank you in advance,

Hi Kim,

Such and option unfortunately does not exist, but closest thing which you can do is to create two custom links for your menu and to add links to two different sites. Also by providing image with html code for your custom link title like this

<img src="" alt="English" height="42" width="42">

you will display flag for your custom link in the front end.

Best Regards!