I have made 3 videos where in the first video you can see that the simple recatcha that comes with abantecart is working
In the second video, i insert my recaptcha site key and secret key and it works!
in the third video i rename in forms manager first name, email, inquiry and recaptcha to portuguese, and when i go and test it, its simply broken!!
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Unfortunately the forum doesn't allow me to post the 3 short videos I've made so that you can see and solve this issue or this bug!
But if you make a fresh install and do what I've just reported, you'll see that this happens to you.