diff --git a/backend/models/dtos/__init__.py b/backend/models/dtos/__init__.py
index 457fd2410a..61376b35ad 100644
--- a/backend/models/dtos/__init__.py
+++ b/backend/models/dtos/__init__.py
@@ -1,7 +1,7 @@
 from functools import wraps
 from flask import request
 from schematics.exceptions import DataError
-
+from werkzeug.exceptions import BadRequest as WerkzeugBadRequest
 
 from backend.exceptions import BadRequest
 
@@ -32,20 +32,36 @@ def wrapper(*args, **kwargs):
 
             try:
                 dto = dto_class()
+                try:
+                    body = request.json if request.is_json else {}
+                except (
+                    WerkzeugBadRequest
+                ):  # If request body does not contain valid JSON then BadRequest is raised by Flask
+                    body = {}
 
-                # Set attribute values from request body, query parameters, and path parameters
                 for attr in dto.__class__._fields:
-                    if request.is_json and attr in request.json:
-                        setattr(dto, attr, request.json[attr])
-                    elif attr in request.args:
-                        setattr(dto, attr, request.args.get(attr))
-                    elif attr in kwargs:
-                        setattr(dto, attr, kwargs[attr])
+                    # Get serialized name of attr if exists otherwise use attr name
+                    field = dto.__class__._fields[attr]
+                    attr_name = field.serialized_name if field.serialized_name else attr
+
+                    # Set attribute value from request body, query parameters, or path parameters
+                    if attr_name in body:
+                        setattr(dto, attr, body[attr_name])
+                    elif attr_name in request.args:
+                        setattr(dto, attr, request.args.get(attr_name))
+                    elif attr_name in kwargs:
+                        setattr(dto, attr, kwargs[attr_name])
 
                 #  Set authenticated user id if user_id is a field in the DTO
                 if "user_id" in dto.__class__._fields:
                     dto.user_id = token_auth.current_user()
 
+                # Get accepted language from request header
+                if "preferred_locale" in dto.__class__._fields:
+                    dto.preferred_locale = request.environ.get(
+                        "HTTP_ACCEPT_LANGUAGE", "en"
+                    )
+
                 dto.validate()
                 request.validated_dto = (
                     dto  # Set validated DTO on request object for use in view function