Off topic: If you are in Germany, the ReCaptcha is displayed in German, even if your browser's preferred language is "en". However, ReCaptcha is now ingrained in muscle memory for people, so they automatically click traffic light/stairs/bus/cars/cycles/palms/hills/zebra crossing, whichever is shown multiple times without reading instructions. For textual ones, people will adapt soon by pattern matching, whatever seems out of normal is the answer :)