fixed error messages for web registering

apps/account/serializers/user_web.py

@@ -1,6 +1,7 @@
 from rest_framework import serializers
 from django.contrib.auth.password_validation import validate_password
 from apps.account.models import User
+from apps.account.utils import get_localized_msg
 
 
 class WebUserRegisterSerializer(serializers.ModelSerializer):
@@ -19,7 +20,8 @@ class WebUserRegisterSerializer(serializers.ModelSerializer):
     def validate_email(self, value):
         normalized_email = User.objects.normalize_email(value)
         if User.objects.filter(email=normalized_email).exists():
-            raise serializers.ValidationError("This email is already registered.")
+            msg = get_localized_msg('email_already_registered', self.context.get('request'))
+            raise serializers.ValidationError(msg)
         return normalized_email
 
     def create(self, validated_data):