Introducing reCAPTCHA v3

Since the end of December last year, we have been implementing "google reCAPTCHA v3", the latest version of the BOT removal tool provided by Google (released on October 29, 2018), in all comment forms on this website. As a result, when used in conjunction with the anti-SPAM WordPress plugin ``Akismet'', almost all SPAM posts from BOTs are automatically excluded (it is also possible to deselect posts).