CleanTalk is a plugin solution for forms, registration  and so on - maeans we get away from ReCaptcha and all its complications.

1. Go to the Cleantalk Dashboard - see 1Password
2. Click the '+ Website' button, copy the Access Key to Dashboard.
3. Install the plugin in the normal way.
4. Configure the plugin by adding the access key and enabling - default settings are fine.
5. Uninstall all reCaptcha plugins
6. Delete all reCaptcha fields from any forms

Works on Joomla, Prestashop and Wordpress.