HI, it request changes inside SPPB code, it cannot be used like that.

Understood. Because I'm experiencing significant issues with spam through my form, and the available reCAPTCHA isn't helping, I need to replace it with a fine form that this plugin can use. I'm receiving hundreds of spam emails in Cyrillic daily.

1. First, lock IP access from countries like RU - it should reduce fake / spam traffic.
2. That plugin may help as well, OSpam-a-not
3. Add one more checkbox field.
4. In Recaptcha Google settings you can set level of security, default is 0.5 - set 0.8 or 0.9 (suggested).