Hi nicofrenchy,

To change theme strings, you can do this via Loco Translate plugin. If you don't have this plugin, please install and activate it in your WordPress site.

1. Then go to Loco Translate > Manage Translations

2. Click "New Language" for the current active theme (if you didn't created it yet, otherwise ignore this step). On the new language page, choose these options and choose the same language – click here http://d.pr/i/1ewoc

3. After that you will be redirected to the editing screen for theme translations. Before you continue make sure this is true – click here http://d.pr/i/18h0w

4. Follow these instructions to learn how to translate strings – http://d.pr/i/1jsek

5. The changes will be applied immediately – http://d.pr/i/1ju6w



Note: Translation files will be saved to wp-content/themes/{theme-name}/languages folder. Here you have the explanation – http://d.pr/i/1lBCJ

After you make your changes, always save a backup when there is new theme update. After you update the theme (languages folder will be replaced), just move the backup files you previously saved to the same languages directory and your changes will still be applied.

P.S. I know you may be confused as I am referring to a translation plugin for changing some words at your site but that's the best and easiest way to do it.