diff --git a/public/language/en-GB/error.json b/public/language/en-GB/error.json
index b32ccfedfb..51008f3699 100644
--- a/public/language/en-GB/error.json
+++ b/public/language/en-GB/error.json
@@ -38,7 +38,7 @@
 
 	"invalid-pagination-value": "Invalid pagination value, must be at least %1 and at most %2",
 
-	"username-taken": "Username taken",
+	"username-taken": "Username taken. Maybe try {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/language/en-US/error.json b/public/language/en-US/error.json
index ea28a9a51c..0e1f671ba0 100644
--- a/public/language/en-US/error.json
+++ b/public/language/en-US/error.json
@@ -32,7 +32,7 @@
     "invalid-path": "Invalid path",
     "folder-exists": "Folder exists",
     "invalid-pagination-value": "Invalid pagination value, must be at least %1 and at most %2",
-    "username-taken": "Username taken",
+    "username-taken": "Username taken. Maybe try {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/language/en-x-pirate/error.json b/public/language/en-x-pirate/error.json
index ea28a9a51c..0e1f671ba0 100644
--- a/public/language/en-x-pirate/error.json
+++ b/public/language/en-x-pirate/error.json
@@ -32,7 +32,7 @@
     "invalid-path": "Invalid path",
     "folder-exists": "Folder exists",
     "invalid-pagination-value": "Invalid pagination value, must be at least %1 and at most %2",
-    "username-taken": "Username taken",
+    "username-taken": "Username taken. Maybe try {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/language/sc/error.json b/public/language/sc/error.json
index ea28a9a51c..0e1f671ba0 100644
--- a/public/language/sc/error.json
+++ b/public/language/sc/error.json
@@ -32,7 +32,7 @@
     "invalid-path": "Invalid path",
     "folder-exists": "Folder exists",
     "invalid-pagination-value": "Invalid pagination value, must be at least %1 and at most %2",
-    "username-taken": "Username taken",
+    "username-taken": "Username taken. Maybe try {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 f989901e7b..5d44377041 100644
--- a/public/src/client/register.js
+++ b/public/src/client/register.js
@@ -135,9 +135,12 @@ define('forum/register', [
 				if (results.every(obj => obj.status === 'rejected')) {
 					showSuccess(usernameInput, username_notify, successIcon);
 				} else {
-					showError(usernameInput, username_notify, '[[error:username-taken]]');
+					const suggestedUsername = `${username}suffix`;
+					showError(
+						usernameInput,
+						username_notify,
+						`Username taken. Maybe try <strong>"${suggestedUsername}"</strong>`);
 				}
-
 				callback();
 			});
 		}