diff --git a/locales/en.js b/locales/en.js
index 1bb1adb9..67309100 100644
--- a/locales/en.js
+++ b/locales/en.js
@@ -160,8 +160,9 @@ Adding this link to your feed reader will keep you up to date.`,
     remove_account_confirm: 'You are about to permanently delete your account',
   },
 
-  err: {
-    register_error: 'Error during registration'
+  error: {
+    nick_taken: 'This nickname is already used',
+    email_taken: 'This email is already used'    
   },
 
   ordinal: {
diff --git a/locales/it.js b/locales/it.js
index 26870c58..d1c49790 100644
--- a/locales/it.js
+++ b/locales/it.js
@@ -165,8 +165,9 @@ export default {
     remove_account_confirm: 'Stai per eliminare definitivamente il tuo account',
   },
 
-  err: {
-    register_error: 'Errore nella registrazione'
+  error: {
+    nick_taken: 'Questo nick è già presente',
+    email_taken: 'Questa email è già registrata'
   },
 
   ordinal: {
diff --git a/pages/register.vue b/pages/register.vue
index c4ba32b8..c608ed8f 100644
--- a/pages/register.vue
+++ b/pages/register.vue
@@ -66,10 +66,10 @@ export default {
         })
         this.$router.replace("/")
       } catch (e) {
-        const error = get(e, 'e.response.data.errors[0].message', String(e))
+        const error = get(e, 'response.data.errors[0].message', String(e))
         Message({
           showClose: true,
-          message: this.$t('register.error') + this.$t(error),
+          message: this.$t(error),
           type: 'error'
         })
       }
diff --git a/server/api/models/user.js b/server/api/models/user.js
index 078081b0..25c2c5cd 100644
--- a/server/api/models/user.js
+++ b/server/api/models/user.js
@@ -9,14 +9,14 @@ module.exports = (sequelize, DataTypes) => {
   const user = sequelize.define('user', {
     username: {
       type: DataTypes.STRING,
-      unique: true,
+      unique: { msg: 'error.username_taken' },
       index: true,
       allowNull: false
     },
     display_name: DataTypes.STRING,
     email: {
       type: DataTypes.STRING,
-      unique: true,
+      unique:  { msg: 'error.email_taken' },
       index: true,
       allowNull: false
     },