https://docs.google.com/document/d/19xptFIQTrP7_5NPboYVL16EigadDQNjEva1zPStnfVg/pub
Webmasters FAQ RUS
webmasters faqrus
https://mcaptcha.org/docs/webmasters/faq
Webmasters FAQ - mCaptcha
Frequently asked questions related to using mCaptcha as a webmaster
webmasters faqmcaptcha