Got a question via private message - so I thought I'd post it here so that everyone can see the answer:
Hi David,
I have added the files to my cart, v1.5.4, english and dutch version.
I have a graphic on the contact us page and create account page, on both languages it says "Ik ben geen robot" (I am not a robot)
How can I get the text in engllish om my english pages?
Answer:
When the request is sent to Google to display the reCaptcha they detect what your language setting is in your browser and automatically display the reCaptcha challenge in that language. So generally for multi-language sites you don't need to do anything, the customers preferred language will be used.
The only time it might be a problem is if the customer is using a computer that isn't their own and the browser language is set to some other language.
It is possible to force the reCaptcha to display in a specific language by adding a language code to the javascript call
eg - to force the display in spanish you would have
script src="https://www.google.com/recaptcha/api.js?hl=es
To do this you would need to alter the file /includes/functions/extra_functions/recaptchalib.php and detect the language being used by Zen. This however might lead to other difficulties - if for instance a Spanish person is looking at your site which is in Dutch and English, they may choose to see the site in English (because their English is better than their Dutch) then tieing the language for Google to the language for Zen would lead to that spanish person seeing an English reCaptcha rather than the Spanish version that they would see by default.
A bit of a rambling answer I'm afraid, but in short you don't have to do anything, your customers will see the reCaptcha in their own language
Regards
David