All of our translation efforts are handled on Transifex (https://www.transifex.com/nodebb/nodebb/), but in general, yes... fixes and incorrect translations would be handled there, and custom changes specific to your community you'd make to those files directly.

@julian i know that. But its not the same as a E-Mail notification.

I just reinstalled the forum and everything is working fine. The links have the right url, I did not have a 403 error even without modifying config.json with socket.io origins. While at the installation I did not change anything. But hey, everything works fine, it's the main lol. Thanks, i love to use NodeBB ! (I just put the url of the site when setting up the forum and not by changing config.json later as I had done the first, it may be from there?)

Admin > (SETTINGS) User > Default User Settings

@julian Thanks!

Actually the email does use the url from config.json. Check it out here https://github.com/NodeBB/NodeBB/blob/master/src/user/email.js#L33

Thanks @baris Noticed it awhile back but didn't get around to fixing it.