Change text of activation email

I also need to change the text of the Acount Activated page:

Your account was activated successfully! You can now log in with the username and password you provided when you signed up.

thanks

I also need to change the text to the of page which appear after the registration which tells you to check your email for the activation link.

Thank you

Hello Catalin, thanks I managed to change the text of the login forms
..\sweetdate\page-parts\general-login-modal.php
..\sweetdate\page-parts\general-forgot-modal.php

http://wordpress.org/plugins/pmpro-email-templates-addon/installation/
Does only manage the emails sent by membership pro plugin,
what I want is to edit the emails that are being send out after registration:
The mails which contains the activation link.

Thanks for registering! To complete the activation of your account please click the following link

I also need to edit following pages: (PLease see me upper requests)

Your account was activated successfully! You can now log in with the username and password you provided when you signed up.

I also need to change the text to the of page which appears after the registration which tells you to check your email for the activation link.

Thank you

I need to add some lines in Spanish…

Thanks for the support

Hello Catalin, I know this plugin: https://wordpress.org/plugins/codestyling-localization/

I don´t want to translate the entire theme to Spanish,

I only want to modify the existing text and add some additional lines in Spanish to the upper mentioned pages and emails.

I just dont´t know where to find the files, so I can change the text

Thanks

Thank you Catalin, I was able to make all the changes, but for some reason the only php file with doesn´t accept my changes is:

“Thanks for registering! To complete the activation of your account please click the following link” can be found in ..\wp-content\plugins\buddypress\bp-core\bp-core-filters.php

Do you know why this could be ?

Thank you now it worked!