Hi Wayne, thanks for getting in touch!
That’s true–The Events Calendar/WooCommerce Tickets and WPML are incompatible at the moment, which you’ve noted.
Creating separate events for each language is a clever idea. The only problem is that they cannot share the same inventory of tickets since each post is treated as separate. I wish there was a way to have two events share a global stock of tickets, but that’s not currently possible. You can add your vote for this feature on our UserVoice forum, which is where we take new feature requests.
Sorry, I know that isn’t the answer you were probably hoping for, but does it help clarify things a bit?
Cheers!
Geoff