Hi, I have the same problem. My website is in italian and I have installed The Events Calendar version 6.0.9. In Loco Translate I see the translated strings but on the site “List | Month | Day” are in English.
I had the same problem; apparently this happens when the customer creates an account from the checkout page. The patch to solve the problem is to go to the woocommerce settings and disable the “disable create account in checkout” option.