My plugin uses wp_create_nonce and wp_verify_nonce.
I can’t answer your question with certainty, as all of this is taken care of by WordPress, but looking at the code in wp_verify_nonce it seems that it should last 24 hours maximum.
I’ve not experienced the problem you’re describing, but I can tell you that the Loco Translate editor uses Ajax, and the nonce is preloaded into the browser. So, without a page refresh, you won’t get a new nonce. So I suppose if you left the editor page open all day, then this could happen. I can only suggest you reload the page if you come back to it after a long idle period.
I can look at regenerating the nonce after each save, but I’ve not been given cause to until now.
Rather than disable it, it looks like you can control nonce_life with a filter.