Please have made the translation and also the timing of the messages, but still remains in English, see the imagem1 it shows the receipt of e-mail in English and the other images show the correct translation.
Apologies for the late response .
Okay i checked into your site and simply replaced the content in the wp-admin -> Emails -> activate email .
There were two fields in the email post type .One for html email templates in buddypress and other for the Plain text messages .
refer : http://prntscr.com/bcz3b2
When i changes the content in plain text field then the email translation worked fine .
Please check screenshot in private reply .