Also, I’d suggest you to install testing version of the core plugin: https://s-plugins.com/testing-version/
Some translation strings were fixed in it, so you wouldn’t have to translate several occurrences of the same string. I’ve also added {item_url} email merge tag which would allow you to display product download URL if you decide to construct your own email template.
Last, but not least – documentation page on Email Merge Tags has been updated as well, as it was a bit outdated https://s-plugins.com/email-merge-tags-email-shortcodes-email-customization/