diff --git a/auth/cas/lang/en/auth_cas.php b/auth/cas/lang/en/auth_cas.php
index 3f5fe1e2621..15cb616d83e 100644
--- a/auth/cas/lang/en/auth_cas.php
+++ b/auth/cas/lang/en/auth_cas.php
@@ -30,8 +30,8 @@ $string['auth_cas_baseuri'] = 'URI of the server (nothing if no baseUri)<br />Fo
 $string['auth_cas_baseuri_key'] = 'Base URI';
 $string['auth_cas_broken_password'] = 'You cannot proceed without changing your password, however there is no available page for changing it. Please contact your Moodle Administrator.';
 $string['auth_cas_cantconnect'] = 'LDAP part of CAS-module cannot connect to server: {$a}';
-$string['auth_cas_casversion'] = 'Version';
-$string['auth_cas_certificate_check'] = 'Turn this to \'yes\' if you want to validate the server certificate';
+$string['auth_cas_casversion'] = 'CAS protocol version';
+$string['auth_cas_certificate_check'] = 'Select \'yes\' if you want to validate the server certificate';
 $string['auth_cas_certificate_path_empty'] = 'If you turn on Server validation, you need to specify a certificate path';
 $string['auth_cas_certificate_check_key'] = 'Server validation';
 $string['auth_cas_certificate_path'] = 'Path of the CA chain file (PEM Format) to validate the server certificate';
@@ -44,22 +44,22 @@ $string['auth_cas_hostname'] = 'Hostname of the CAS server <br />eg: host.domain
 $string['auth_cas_hostname_key'] = 'Hostname';
 $string['auth_cas_changepasswordurl'] = 'Password-change URL';
 $string['auth_cas_invalidcaslogin'] = 'Sorry, your login has failed - you could not be authorised';
-$string['auth_cas_language'] = 'Selected language';
+$string['auth_cas_language'] = 'Select language for authentication pages';
 $string['auth_cas_language_key'] = 'Language';
 $string['auth_cas_logincas'] = 'Secure connection access';
-$string['auth_cas_logoutcas'] = 'Turn this to \'yes\' if you want to logout from CAS when you disconnect from Moodle';
-$string['auth_cas_logoutcas_key'] = 'Logout CAS';
-$string['auth_cas_multiauth'] = 'Turn this to \'yes\' if you want to have multi-authentication (CAS + other authentication)';
+$string['auth_cas_logoutcas'] = 'Select \'yes\' if you want to logout from CAS when you disconnect from Moodle';
+$string['auth_cas_logoutcas_key'] = 'CAS logout option';
+$string['auth_cas_multiauth'] = 'Select \'yes\' if you want to have multi-authentication (CAS + other authentication)';
 $string['auth_cas_multiauth_key'] = 'Multi-authentication';
 $string['auth_casnotinstalled'] = 'Cannot use CAS authentication. The PHP LDAP module is not installed.';
 $string['auth_cas_port'] = 'Port of the CAS server';
 $string['auth_cas_port_key'] = 'Port';
-$string['auth_cas_proxycas'] = 'Turn this to \'yes\' if you use CASin proxy-mode';
+$string['auth_cas_proxycas'] = 'Select \'yes\' if you use CAS in proxy-mode';
 $string['auth_cas_proxycas_key'] = 'Proxy mode';
 $string['auth_cas_server_settings'] = 'CAS server configuration';
 $string['auth_cas_text'] = 'Secure connection';
 $string['auth_cas_use_cas'] = 'Use CAS';
-$string['auth_cas_version'] = 'Version of CAS';
+$string['auth_cas_version'] = 'CAS protocol version to use';
 $string['CASform'] = 'Authentication choice';
 $string['noldapserver'] = 'No LDAP server configured for CAS! Syncing disabled.';
 $string['pluginname'] = 'CAS server (SSO)';