It is a pure text alternative to CAPTCHAs. MoinMoin uses it to prevent wiki spamming. Features: for page save, ask a random question match the given answer against a regular expression q and a can be configured in the wiki config multi language support: a user gets a textcha in his language or in language_default or in English (depending on availability of questions/answers for the language) Tips for answering: you need to answer the textcha for e.g.: page save attachment upload user profile creation you do not need to answer the textcha for e.g.: page preview (if you do, it will remember what you entered, though) user profile changes it is usually a simple/short answer it compares case-insensitive sometimes you can find the right answer by reading some important pages of the wiki

Tips for configuration: have 1 word / 1 number answers ask questions that normal users of your site are likely to be able to answer do not ask too hard questions do not ask "computable" questions, like "1+1" or "2*3" do not ask too common questions do not share your questions with other sites / copy questions from other sites (or spammers might try to adapt to this) you should at least give textchas for 'en' (or for your language_default, if that is not 'en') as this will be used as fallback if MoinMoin does not find a textcha in the user's language In your wiki config, do something like this: