diff --git a/competition/views.py b/competition/views.py
index 67faa286..ea1cf4a9 100644
--- a/competition/views.py
+++ b/competition/views.py
@@ -266,7 +266,7 @@ def upload_model_solution(self, request, pk=None):
         """Nahrá užívateľské riešenie k úlohe"""
         problem: Problem = self.get_object()
         if 'file' not in request.FILES:
-            raise exceptions.ParseError(detail='Request neobsahoval súbor')
+            raise exceptions.ParseError(detail='Požiadávka neobsahovala súbor')
         file = request.FILES['file']
         if mime_type(file) != 'application/pdf':
             raise exceptions.ParseError(
@@ -338,17 +338,17 @@ def upload_solutions_with_points(self, request, pk=None):
         """Nahrá .zip archív s opravenými riešeniami (pdf-kami)."""
 
         if 'file' not in request.data:
-            raise exceptions.ParseError(detail='No file attached')
+            raise exceptions.ParseError(detail='Nie je priložený súbor')
 
         zfile = request.data['file']
 
         if not zipfile.is_zipfile(zfile):
             raise exceptions.ParseError(
-                detail='Attached file is not a zip file')
+                detail='Priložený súbor nie je súbor s príponou zip.')
 
         with zipfile.ZipFile(zfile) as zfile:
             if zfile.testzip():
-                raise exceptions.ParseError(detail='Zip file is corrupted')
+                raise exceptions.ParseError(detail='Súbor zip je poškodený')
 
             parsed_filenames = []
             errors = []
@@ -367,20 +367,20 @@ def upload_solutions_with_points(self, request, pk=None):
                 except (IndexError, ValueError, AssertionError):
                     errors.append({
                         'filename': filename,
-                        'status': 'Cannot parse file'
+                        'status': 'Nie je možné analyzovať súbor'
                     })
                     continue
                 except EventRegistration.DoesNotExist:
                     errors.append({
                         'filename': filename,
-                        'status': f'User registration with id {registration_pk} does not exist'
+                        'status': f'Registrácia používateľa s id {registration_pk} neexistuje'
                     })
                     continue
                 except Solution.DoesNotExist:
                     errors.append({
                         'filename': filename,
-                        'status': f'Solution with registration id {registration_pk}'
-                        f'and problem id {problem_pk} does not exist'
+                        'status': f'Riešenie s registračným id {registration_pk}'
+                        f'a id úlohy {problem_pk} neexistuje'
                     })
                     continue
 
@@ -518,7 +518,7 @@ def file_corrected(self, request, pk=None):
     def upload_solution_file(self, request, pk=None):
         solution: Solution = self.get_object()
         if 'file' not in request.FILES:
-            raise exceptions.ParseError(detail='Request neobsahoval súbor')
+            raise exceptions.ParseError(detail='Požiadávka neobsahovala súbor')
 
         file = request.FILES['file']
         if mime_type(file) != 'application/pdf':
@@ -535,7 +535,7 @@ def upload_solution_file(self, request, pk=None):
     def upload_corrected_solution_file(self, request, pk=None):
         solution: Solution = self.get_object()
         if 'file' not in request.FILES:
-            raise exceptions.ParseError(detail='Request neobsahoval súbor')
+            raise exceptions.ParseError(detail='Požiadávka neobsahovala súbor')
 
         file = request.FILES['file']
         if mime_type(file) != 'application/pdf':
@@ -830,7 +830,7 @@ def download_publication(self, request, pk=None):
     def upload_publication(self, request):
         """Nahrá súbor publikácie"""
         if 'file' not in request.data:
-            raise exceptions.ParseError(detail='Request neobsahoval súbor')
+            raise exceptions.ParseError(detail='Požiadavka neobsahovala súbor')
 
         file = request.data['file']
         if mime_type(file) not in ['application/pdf', 'application/zip']:
diff --git a/user/serializers.py b/user/serializers.py
index b88445b6..e4f9cab5 100644
--- a/user/serializers.py
+++ b/user/serializers.py
@@ -39,7 +39,7 @@ def get_auth_user(self, email, password):
 
     def validate_auth_user_status(self, user):
         if not user.is_active:
-            msg = 'User nie je aktívny'
+            msg = 'Používateľ nie je aktívny'
             raise exceptions.ValidationError(msg)
 
     def validate_email_verification_status(self, user):
@@ -177,7 +177,7 @@ def validate_email(self, email):
         email = get_adapter().clean_email(email)
         if email and EmailAddress.objects.filter(email__iexact=email).exists():
             raise serializers.ValidationError(
-                "Entered email adress is already used! Please try again with another email adress.")
+                "Zadaná emailová adresa je už používaná. Prosíme skús vyskúsať inú emailovú adresu.")
         return email
 
     def validate_password1(self, password):
@@ -189,18 +189,18 @@ def validate_profile(self, profile):
         '''
         if not profile['gdpr']:
             raise serializers.ValidationError(
-                'You have to confirm, that you are aware of the processing of personal data.')
+                'Musíš podvrdiť, že si si vedomý spracovania osobných údajov.')
         return profile
 
     def validate(self, attrs):
         if attrs['password1'] != attrs['password2']:
-            raise serializers.ValidationError("Entered passwords do not match.")
+            raise serializers.ValidationError("Zadané heslá sa nezhodujú.")
 
         # ak je zadana skola "ina skola", musi byt nejaky description skoly
         if (attrs['profile']['school'].code == self.OTHER_SCHOOL_CODE and
                 len(attrs['new_school_description']) == 0):
             raise serializers.ValidationError(
-                'You must enter a description of your school.')
+                'Musíš zadať popis tvojej školy.')
 
         return attrs