Hi there,
You can language override the following language constants which is at
Backend > Extensions > Languages > Overrides.
COM_EASYBLOG_MAIL_TEMPLATE_SUBSCRIPTION_CONFIRMATION_SUBHEADING="Confirmation of your subscription on our site"
COM_EB_NOTIFICATION_SUBSCRIBE_VERIFICATION_NOTICE="If you received this email by mistake, simply delete it. You won't be subscribed if you don't click the confirmation link above."
COM_EB_NOTIFICATION_SUBSCRIBE_VERIFICATION="Yes, subscribe me to this list"
COM_EB_MAIL_TEMPLATE_SUBSCRIBE_VERIFICATION_SUBHEADING="Confirmation of your subscription on our site"
COM_EB_MAIL_TEMPLATE_SUBSCRIBE_VERIFICATION_HEADING="Please Confirm Subscription"
COM_EB_NOTIFICATION_DELETE_INFO="To delete your information from the site, please click"