I want change the label on the forms

For the label on forms I am seeing echo language::translate('title_email', 'E-mail). I tried to change the 'E-mail' to say 'Confirm E-mail'. If I bypass the language::translate I can have the label say whatever I echo. How can I change the text echoed by language::translate?
This is an awesome product just trying to understand the code a little better. Thanks in advance!

The second param 'E-mail' is a translation injection, meaning it is pushed to the database. You can control the key in Admin -> Translations.