Thanks for using our theme and for the request. WPML translation is not available for the Builder, right now. However, there is an option that allows sending different templates to customers from different countries.
It is “Apply to billing countries” in the rules section in the right side of email template. You can create multi templates then change email contents with these respective country languages, then apply to send to countries using that language.
For example, Email Hungarian will be applied for country billing in Hungary, Slovak email will be applied for Slovakia. You can see these images: https://prnt.sc/vx9w5c and https://prnt.sc/vibxk0
