Translation of email template
The email template don't respect the party lang, it uses the user lang to set the subject and body of the email.
Reproduce: Set you user preferences to english Create email template (for invoice) translated to 2 languages (ex. spanish/english). Set party A lang to spanish Go to invoice for party A, try to send a email with the created template. The text remains in english when should be spanish. Set you user preferences to english Go to invoice for party A, try to send a email with the created template. The text has switched to Spanish as is your user lang.
Tested on 6.0