This plugin sends verification emails to newly registered wordpress users and asks them to verify their email address.
The email templates are located under tpl/emails directory, and the file for verification email is called verify.php which is the default template for english language
however you can add your own language-specific template file by duplicating verify.php and renaming it to verify-LOCALE_CODE.php
for example for Portuguese ( Brazil ) you can add a file named verify-pt_BR.php ( you can get your wordpress installation locale code with get_locale() )
There are also dw_verify_email_template_path and dw_verify_email_template_args filters available if you want to make modifications from your theme's functions.php
WP_MAIL ( for sending templated emails )