1. Post a link to your forum.
2. Use a stock template and see if you have a button. It’s not really a button, it’s just a link that says “ADD NEW >”. It’s part of the template files.
What template file actually has the link where the text Add New can be modified?
alexandreperei: That’s a phpBB forum and was earlier as well. Are you looking for help with phpBB or bbPress?
bmg1227: I think the actual text appears in /bb-includes/template-functions.php either line 139 or 1063, depending on if you want “Add New Topic” or “Add New »”. The template file holds the reference that makes that appear in the page, but the text is in this file I believe.
Not sure if adding a translation/language file would translate that text or not.