diff --git a/lang/en/admin.php b/lang/en/admin.php
index 8eead64146b..5026aa2d107 100644
--- a/lang/en/admin.php
+++ b/lang/en/admin.php
@@ -305,8 +305,8 @@ $string['configproxypassword'] = 'Password needed to access internet through pro
 $string['configproxyport'] = 'If this server needs to use a proxy computer, then provide the proxy port here.';
 $string['configproxytype'] = 'Type of web proxy (PHP5 and cURL extension required for SOCKS5 support).';
 $string['configproxyuser'] = 'Username needed to access internet through proxy if required, empty if none (PHP cURL extension required).';
-$string['configrecaptchaprivatekey'] = 'String of characters (private key) used to communicate between your Moodle server and the recaptcha server. ReCAPTCHA keys can be obtained from <a target="_blank" href="https://www.google.com/recaptcha">Google reCAPTCHA</a>.';
-$string['configrecaptchapublickey'] = 'String of characters (public key) used to display the reCAPTCHA element in the signup form. ReCAPTCHA keys can be obtained from <a target="_blank" href="https://www.google.com/recaptcha">Google reCAPTCHA</a>.';
+$string['configrecaptchaprivatekey'] = 'String of characters (secret key) used to communicate between your Moodle server and the recaptcha server. ReCAPTCHA keys can be obtained from <a target="_blank" href="https://www.google.com/recaptcha">Google reCAPTCHA</a>.';
+$string['configrecaptchapublickey'] = 'String of characters (site key) used to display the reCAPTCHA element in the signup form. ReCAPTCHA keys can be obtained from <a target="_blank" href="https://www.google.com/recaptcha">Google reCAPTCHA</a>.';
 $string['configrequestcategoryselection'] = 'Allow the selection of a category when requesting a course.';
 $string['configrequestedstudentname'] = 'Word for student used in requested courses';
 $string['configrequestedstudentsname'] = 'Word for students used in requested courses';
diff --git a/lang/en/auth.php b/lang/en/auth.php
index d5f70cb0bf9..3384c8b55f1 100644
--- a/lang/en/auth.php
+++ b/lang/en/auth.php
@@ -139,9 +139,9 @@ $string['pluginnotenabled'] = 'Authentication plugin \'{$a}\' is not enabled.';
 $string['pluginnotinstalled'] = 'Authentication plugin \'{$a}\' is not installed.';
 $string['potentialidps'] = 'Log in using your account on:';
 $string['recaptcha'] = 'reCAPTCHA';
-$string['recaptcha_help'] = 'The CAPTCHA is for preventing abuse from automated programs. Simply enter the words in the box, in order and separated by a space.
+$string['recaptcha_help'] = 'The CAPTCHA is for preventing abuse from automated programs. Follow the instructions to verify you are a person. This could be a box to check, characters presented in an image you must enter or a set of images to select from.
 
-If you are not sure what the words are, you can try getting another CAPTCHA or an audio CAPTCHA.';
+If you are not sure what the images are, you can try getting another CAPTCHA or an audio CAPTCHA.';
 $string['recaptcha_link'] = 'auth/email';
 $string['security_question'] = 'Security question';
 $string['selfregistration'] = 'Self registration';
diff --git a/lang/en/moodle.php b/lang/en/moodle.php
index 3d14d662b04..5f6250d48fc 100644
--- a/lang/en/moodle.php
+++ b/lang/en/moodle.php
@@ -1217,7 +1217,7 @@ $string['missinglastname'] = 'Missing surname';
 $string['missingname'] = 'Missing name';
 $string['missingnewpassword'] = 'Missing new password';
 $string['missingpassword'] = 'Missing password';
-$string['missingrecaptchachallengefield'] = 'Missing reCAPTCHA challenge field';
+$string['missingrecaptchachallengefield'] = 'Failed reCAPTCHA challenge, try again.';
 $string['missingreqreason'] = 'Missing reason';
 $string['missingshortname'] = 'Missing short name';
 $string['missingshortsitename'] = 'Missing short site name';