diff --git a/auth/oidc/lang/en/auth_oidc.php b/auth/oidc/lang/en/auth_oidc.php
index c6031d7e0..2ed27bf54 100644
--- a/auth/oidc/lang/en/auth_oidc.php
+++ b/auth/oidc/lang/en/auth_oidc.php
@@ -111,7 +111,6 @@
 $string['cfg_err_invalidauthendpoint'] = 'Invalid Authorization Endpoint';
 $string['cfg_err_invalidtokenendpoint'] = 'Invalid Token Endpoint';
 $string['cfg_err_invalidclientid'] = 'Invalid client ID';
-$string['error_masked_secret_not_changed'] = 'Please enter a new value. The masked value cannot be saved.';
 $string['cfg_err_invalidclientsecret'] = 'Invalid client secret';
 $string['cfg_forceredirect_key'] = 'Force redirect';
 $string['cfg_forceredirect_desc'] = 'If enabled, will skip the login index page and redirect to the OpenID Connect page. Can be bypassed with ?noredirect=1 URL param';
@@ -236,7 +235,6 @@
 $string['errorauthdisconnectnewmethod'] = 'Use Login Method';
 $string['errorauthdisconnectinvalidmethod'] = 'Invalid login method received.';
 $string['errorauthdisconnectifmanual'] = 'If using the manual login method, enter credentials below.';
-$string['errorauthdisconnectinvalidmethod'] = 'Invalid login method received.';
 $string['errorauthgeneral'] = 'There was a problem logging you in. Please contact your administrator for assistance.';
 $string['errorauthinvalididtoken'] = 'Invalid id_token received.';
 $string['errorauthloginfailednouser'] = 'Invalid login: User not found in Moodle. If this site has the "authpreventaccountcreation" setting enabled, this may mean you need an administrator to create an account for you first.';
@@ -283,6 +281,8 @@
 $string['error_tenant_specific_endpoint_required'] = 'When using "Microsoft identity platform (v2.0)" IdP type and "Certificate" authentication method, tenant specific endpoint (i.e. not common/organizations/consumers) is required.';
 $string['error_empty_oidcresource'] = 'Resource cannot be empty when using Microsoft Entra ID (v1.0) or other types of IdP.';
 $string['error_invalid_custom_claim'] = 'Invalid custom claim name. Custom claims can only contain alphanumeric characters, hyphens, and underscores.';
+$string['error_masked_secret_not_changed'] = 'Please enter a new value or uncheck the "Change" checkbox to keep the current value.';
+$string['auth_settings_validation_error'] = 'Invalid authentication settings detected. The following configuration issues must be resolved to ensure successful authentication:';
 $string['errorupnchangeisnotsupported'] = 'Your Microsoft account UPN has changed. Please contact your administrator to update your Moodle account.';
 $string['erroruserwithusernamealreadyexists'] = 'Error occurred when trying to rename your Moodle account. A Moodle user with the new username already exists. Ask your site administrator to resolve this first.';
 $string['error_no_response_available'] = 'No responses available.';