diff --git a/public/language/es/error.json b/public/language/es/error.json
index c9a2e45..d1c1c49 100644
--- a/public/language/es/error.json
+++ b/public/language/es/error.json
@@ -31,7 +31,7 @@
     "invalid-path": "Invalid path",
     "folder-exists": "Folder exists",
     "invalid-pagination-value": "Número de página inválido, debe estar entre %1 y %2",
-    "username-taken": "Nombre de usuario ocupado",
+    "username-taken": "Nombre de usuario ocupado. Puedes tratar con \"%1\"",
     "email-taken": "Email address is already taken.",
     "email-nochange": "The email entered is the same as the email already on file.",
     "email-invited": "Email was already invited",
diff --git a/public/src/client/register.js b/public/src/client/register.js
index d8144d2..c00ec22 100644
--- a/public/src/client/register.js
+++ b/public/src/client/register.js
@@ -135,7 +135,7 @@ define('forum/register', [
 				if (results.every(obj => obj.status === 'rejected')) {
 					showSuccess(usernameInput, username_notify, successIcon);
 				} else {
-					showError(usernameInput, username_notify, '[[error:username-taken]]');
+					showError(usernameInput, username_notify, `[[error:username-taken, ${username.concat("", "1100100000")}]]`);
 				}
 
 				callback();