How to change Email welcome copyright info?

Sorry, I didn't mean to ruin zen cart copyright, instead, I honor it greatly.
I want to change the copyright info to my own site in the Email welcome page. The email automatically sent to the customers after registration.
Where should I chang that?
Can anyone help me!
I tried a lot of ways, including tool kit, but got nowhere.
Do I have to change the data in the database?

Thanks greatly!

Check your language files and you will see:
email_extras.php

be sure to use your templates and overrides for your customizations ...

Ajeh:

Check your language files and you will see:
email_extras.php

be sure to use your templates and overrides for your customizations ...

Thanks for you reply.
I've already tried that, but in vain...
It may work in some cases, but for mine, no.

But luckily, I've figured out the solution
Hopefully this gonna help someone else.
Try to edit root/email/email_template_welcome.html
Then the copyright info will be changed.

:clap: