diff --git a/frontend/public/locales/en/common.json b/frontend/public/locales/en/common.json
index 47d8d8e20098e7ab59b28b4f58e67c4bc7f870ba..e05cd659ebaac25870f26adde30bb6a169856549 100644
--- a/frontend/public/locales/en/common.json
+++ b/frontend/public/locales/en/common.json
@@ -11,7 +11,7 @@
     "firstName": "First name",
     "lastName": "Last name",
     "dateOfBirth": "Date of birth",
-    "nationalIdNumber": "National ID number",
+    "nationalIdNumber": "Norwegian national ID number",
     "roleType": "Role",
     "roleStartDate": "From",
     "roleEndDate": "To (including)",
@@ -114,13 +114,13 @@
     "invitationExpired": "Invitation expired"
   },
   "details": "Details",
-  "nationalIdNumber": "National ID number",
+  "nationalIdNumber": "Norwegian national ID number",
   "validation": {
     "firstNameRequired": "First name is required",
     "lastNameRequired": "Last name is required",
     "dateOfBirthRequired": "Date of birth is required",
-    "invalidIdNumber": "Invalid national ID number",
-    "nationalIdNumberRequired": "National ID number required",
+    "invalidIdNumber": "Invalid Norwegian national ID number",
+    "nationalIdNumberRequired": "Norwegian national ID number required",
     "roleTypeRequired": "Role type is required",
     "roleEndRequired": "Role end date is required",
     "emailRequired": "E-mail is required",
@@ -135,8 +135,8 @@
     "startDateMustBeBeforeEndDate": "Start date has to be before end date",
     "phoneNumberAndCountryCode": "Both country code and phone number must be set",
     "passportNationalityAndNumber": "Both passport nationality and number need to be set",
-    "doubleIdentity": "*You have input both national ID and passport. Please choose only one.",
-    "nationalIdOrPassport": "National ID or passport information need to be entered",
+    "doubleIdentity": "*You have input both Norwegian national ID and passport. Please choose only one.",
+    "nationalIdOrPassport": "Norwegian national ID number or passport information need to be entered",
     "genderIsRequired": "Gender is required"
   },
   "button": {
@@ -211,11 +211,11 @@
       "invalid_invite": "Invalid invite",
       "invite_expired": "Invite has expired",
       "cannot_update_fields": "Failed to update data",
-      "update_national_id_not_allowed": "Not allowed to update verified national ID",
+      "update_national_id_not_allowed": "Not allowed to update verified Norwegian ID",
       "invite_email_failed": "There was a problem sending the invite e-mail. Contact support.",
       "duplicate_private_email": "There is already a guest with the registered e-mail",
       "duplicate_private_mobile_number": "There is already a guest with the registered mobile phone number",
-      "duplicate_private_national_id_number": "There is already a guest with the national ID number given",
+      "duplicate_private_national_id_number": "There is already a guest with the Norwegian national ID number given",
       "duplicate_private_passport_number": "There is already a guest with the passport number given"
     }
   },
diff --git a/frontend/src/routes/guest/register/index.test.tsx b/frontend/src/routes/guest/register/index.test.tsx
index ed7f8d1e3962cf47da24edc6e98134ce82c531df..4969ed4dddb82c1351300f2353f9d1b356072c4a 100644
--- a/frontend/src/routes/guest/register/index.test.tsx
+++ b/frontend/src/routes/guest/register/index.test.tsx
@@ -44,7 +44,7 @@ const allFeaturesOn = {
 
 test('Field showing values correctly', async () => {
   fetchMock.mockIf('/api/ui/v1/invited/', () =>
-    Promise.resolve<any>(JSON.stringify(testData)),
+    Promise.resolve<any>(JSON.stringify(testData))
   )
 
   render(
@@ -54,7 +54,7 @@ test('Field showing values correctly', async () => {
           <GuestRegister />
         </LocalizationProvider>
       </FeatureContext.Provider>
-    </BrowserRouter>,
+    </BrowserRouter>
   )
 
   await screen.findByDisplayValue(testData.person.first_name)
@@ -79,19 +79,19 @@ test('Field showing values correctly', async () => {
   // TODO Haven't been able to mock getting role types properly yet, so not checking role name
   // await screen.findByDisplayValue(testData.role.name_en)
   await screen.findByDisplayValue(
-    `${testData.role.start} - ${testData.role.end}`,
+    `${testData.role.start} - ${testData.role.end}`
   )
 
   // For the default setup the contact person at unit field should be showing
   await screen.findByDisplayValue(testData.role.contact_person_unit)
 })
 
-test('Gender and birth date suggestions not showing if no national ID given', async () => {
+test('Gender and birth date suggestions not showing if no Norwegian national ID given', async () => {
   // Clear the fnr
   // @ts-ignore
   testData.person.fnr = null
   fetchMock.mockIf('/api/ui/v1/invited/', () =>
-    Promise.resolve<any>(JSON.stringify(testData)),
+    Promise.resolve<any>(JSON.stringify(testData))
   )
   render(
     <BrowserRouter>
@@ -100,7 +100,7 @@ test('Gender and birth date suggestions not showing if no national ID given', as
           <GuestRegister />
         </LocalizationProvider>
       </FeatureContext.Provider>
-    </BrowserRouter>,
+    </BrowserRouter>
   )
 
   // Wait a bit so that all the values are showing
@@ -117,7 +117,7 @@ test('Gender and birth date suggestions not showing if no national ID given', as
 })
 
 test('Gender and birth date suggestions not overriding existing values', async () => {
-  // Make the date of birth and national ID not match
+  // Make the date of birth and Norwegian national ID not match
   testData.person.fnr = '08015214555'
   // @ts-ignore
   testData.person.date_of_birth = '1960-01-08'
@@ -126,7 +126,7 @@ test('Gender and birth date suggestions not overriding existing values', async (
   testData.person.gender = 'female'
 
   fetchMock.mockIf('/api/ui/v1/invited/', () =>
-    Promise.resolve<any>(JSON.stringify(testData)),
+    Promise.resolve<any>(JSON.stringify(testData))
   )
   render(
     <BrowserRouter>
@@ -135,7 +135,7 @@ test('Gender and birth date suggestions not overriding existing values', async (
           <GuestRegister />
         </LocalizationProvider>
       </FeatureContext.Provider>
-    </BrowserRouter>,
+    </BrowserRouter>
   )
 
   // In this a date of birth was already set, and it should not have been overridden by a suggestion
@@ -146,7 +146,6 @@ test('Gender and birth date suggestions not overriding existing values', async (
   await screen.findByDisplayValue('female')
 })
 
-
 test('Gender is remembered when going back', async () => {
   testData.person.fnr = ''
   // @ts-ignore
@@ -154,7 +153,8 @@ test('Gender is remembered when going back', async () => {
   testData.person.passport = 'NO-12345678'
 
   fetchMock.mockIf('/api/ui/v1/invited/', () =>
-    Promise.resolve<any>(JSON.stringify(testData)))
+    Promise.resolve<any>(JSON.stringify(testData))
+  )
 
   render(
     <BrowserRouter>
@@ -163,7 +163,7 @@ test('Gender is remembered when going back', async () => {
           <GuestRegister />
         </LocalizationProvider>
       </FeatureContext.Provider>
-    </BrowserRouter>,
+    </BrowserRouter>
   )
 
   // Wait for data to be visible
@@ -192,7 +192,8 @@ test('Gender not required when gender field is not shown', async () => {
   testData.person.passport = 'NO-12345678'
 
   fetchMock.mockIf('/api/ui/v1/invited/', () =>
-    Promise.resolve<any>(JSON.stringify(testData)))
+    Promise.resolve<any>(JSON.stringify(testData))
+  )
 
   const genderFieldOff = {
     displayContactAtUnit: true,
@@ -208,7 +209,7 @@ test('Gender not required when gender field is not shown', async () => {
           <GuestRegister />
         </LocalizationProvider>
       </FeatureContext.Provider>
-    </BrowserRouter>,
+    </BrowserRouter>
   )
 
   // Wait for data to be visible
diff --git a/frontend/src/routes/guest/register/steps/register.test.tsx b/frontend/src/routes/guest/register/steps/register.test.tsx
index d2eafe6cff7e3735cbcaf533d40cb73b534b2fbc..ad034c1186e352217b3804e7a13ebbc227f4384f 100644
--- a/frontend/src/routes/guest/register/steps/register.test.tsx
+++ b/frontend/src/routes/guest/register/steps/register.test.tsx
@@ -51,7 +51,7 @@ test('Guest register page showing passport field on manual registration', async
         initialGuestData={getEmptyGuestData()}
         registerData={null}
       />
-    </LocalizationProvider>,
+    </LocalizationProvider>
   )
 
   await waitFor(() => {
@@ -76,7 +76,7 @@ test('Name not editable if present and invite is Feide', async () => {
         initialGuestData={testData}
         registerData={null}
       />
-    </LocalizationProvider>,
+    </LocalizationProvider>
   )
 
   await waitFor(() => {
@@ -100,7 +100,7 @@ test('Name editable if missing and invite is Feide', async () => {
         initialGuestData={testData}
         registerData={null}
       />
-    </LocalizationProvider>,
+    </LocalizationProvider>
   )
 
   await waitFor(() => {
@@ -109,7 +109,7 @@ test('Name editable if missing and invite is Feide', async () => {
   })
 })
 
-test('Identifier fields disabled if invite is Feide and national ID present', async () => {
+test('Identifier fields disabled if invite is Feide and Norwegian national ID number present', async () => {
   const nextHandler = (registerData: GuestRegisterData) => {
     console.log(`Entered data: ${registerData}`)
   }
@@ -125,7 +125,7 @@ test('Identifier fields disabled if invite is Feide and national ID present', as
         initialGuestData={testData}
         registerData={null}
       />
-    </LocalizationProvider>,
+    </LocalizationProvider>
   )
 
   await waitFor(() => {
@@ -135,7 +135,7 @@ test('Identifier fields disabled if invite is Feide and national ID present', as
   })
 })
 
-test('Identifier fields enabled if invite is Feide but national ID number missing', async () => {
+test('Identifier fields enabled if invite is Feide but Norwegian national ID number missing', async () => {
   const nextHandler = (registerData: GuestRegisterData) => {
     console.log(`Entered data: ${registerData}`)
   }
@@ -151,7 +151,7 @@ test('Identifier fields enabled if invite is Feide but national ID number missin
         initialGuestData={testData}
         registerData={null}
       />
-    </LocalizationProvider>,
+    </LocalizationProvider>
   )
 
   await waitFor(() => {
@@ -177,7 +177,7 @@ test('Identifier fields disabled and name fields enabled if invite is ID-porten'
         initialGuestData={testData}
         registerData={null}
       />
-    </LocalizationProvider>,
+    </LocalizationProvider>
   )
 
   await waitFor(() => {
@@ -223,14 +223,14 @@ test('Gender required to be set if gender field is showing', async () => {
           ref={reference}
         />
       </LocalizationProvider>
-    </FeatureContext.Provider>,
+    </FeatureContext.Provider>
   )
 
   reference.current?.doSubmit()
 
   // The validation should fail for gender since to value has been set
   const validationMessage = await waitFor(() =>
-    screen.getByText('validation.genderIsRequired'),
+    screen.getByText('validation.genderIsRequired')
   )
   expect(validationMessage).toBeInTheDocument()
 })
@@ -276,19 +276,19 @@ test('Gender not required to be set if gender field is not showing', async () =>
           ref={reference}
         />
       </LocalizationProvider>
-    </FeatureContext.Provider>,
+    </FeatureContext.Provider>
   )
 
   reference.current?.doSubmit()
   await waitFor(
     () => {
       expect(
-        screen.queryByText('validation.genderIsRequired'),
+        screen.queryByText('validation.genderIsRequired')
       ).not.toBeInTheDocument()
     },
     {
       timeout: 5000,
-    },
+    }
   )
 })
 
@@ -328,7 +328,7 @@ test('Guest not allowed to proceed in wizard if phone number is not valid', asyn
           ref={reference}
         />
       </LocalizationProvider>
-    </FeatureContext.Provider>,
+    </FeatureContext.Provider>
   )
 
   await act(async () => reference.current?.doSubmit())
@@ -372,7 +372,7 @@ test('Guest allowed to proceed in wizard if data is valid', async () => {
           ref={reference}
         />
       </LocalizationProvider>
-    </FeatureContext.Provider>,
+    </FeatureContext.Provider>
   )
 
   await act(async () => reference.current?.doSubmit())
@@ -385,7 +385,6 @@ test('Default country code gets set in form values', async () => {
   let guestRegisterData: GuestRegisterData | null = null
   const nextHandler = (registerData: GuestRegisterData) => {
     guestRegisterData = registerData
-
   }
 
   // Leave the mobile phone country code blank, it should
@@ -423,7 +422,7 @@ test('Default country code gets set in form values', async () => {
           ref={reference}
         />
       </LocalizationProvider>
-    </FeatureContext.Provider>,
+    </FeatureContext.Provider>
   )
 
   expect(guestRegisterData).toBeNull()
@@ -433,16 +432,13 @@ test('Default country code gets set in form values', async () => {
   expect(guestRegisterData.mobilePhoneCountry).toEqual('NO')
 })
 
-
 test('Foreign country code gets set in form values', async () => {
   // This stores the data sent from the form when the user clicks submit
   let guestRegisterData: GuestRegisterData | null = null
   const nextHandler = (registerData: GuestRegisterData) => {
     guestRegisterData = registerData
-
   }
 
-
   const formData: GuestRegisterData = {
     firstName: 'Test',
     lastName: 'Test2',
@@ -466,7 +462,6 @@ test('Foreign country code gets set in form values', async () => {
     },
   }
 
-
   render(
     <FeatureContext.Provider value={allFeaturesOn}>
       <LocalizationProvider dateAdapter={AdapterDateFns}>
@@ -477,7 +472,7 @@ test('Foreign country code gets set in form values', async () => {
           ref={reference}
         />
       </LocalizationProvider>
-    </FeatureContext.Provider>,
+    </FeatureContext.Provider>
   )
 
   const countryCodeInput = screen.getByTestId('phone-country-code-select-inner')
diff --git a/frontend/src/routes/guest/register/steps/register.tsx b/frontend/src/routes/guest/register/steps/register.tsx
index d9db88a4668b273caed13e6c2122424975dfd782..3d5a564cc78ff80d1857a88b3ac078fb75619b69 100644
--- a/frontend/src/routes/guest/register/steps/register.tsx
+++ b/frontend/src/routes/guest/register/steps/register.tsx
@@ -97,7 +97,7 @@ const GuestRegisterStep = forwardRef(
     })
 
     // If there is no already a date of birth set, add a suggestion for
-    // this value based on the national ID, if it is set
+    // this value based on the Norwegian ID, if it is set
     if (
       (!registerData || !registerData.dateOfBirth) &&
       !initialGuestData.date_of_birth &&
@@ -149,7 +149,7 @@ const GuestRegisterStep = forwardRef(
         !data.passportNumber &&
         !data.passportNationality
       ) {
-        // The user has not entered a national ID number nor passport information.
+        // The user has not entered a Norwegian national ID number nor passport information.
         // In this case the user should not be allowed to send in the registration
         setIdErrorState(t('validation.nationalIdOrPassport'))
         return
@@ -272,7 +272,7 @@ const GuestRegisterStep = forwardRef(
       if (registerData?.gender) {
         // Need to set gender in the state and also in the form. This is
         // to handle the case where the gender is suggested by the
-        // national ID number
+        // Norwegian national ID number
         setValue('gender', registerData.gender)
         setGender(registerData.gender)
       }
@@ -313,7 +313,7 @@ const GuestRegisterStep = forwardRef(
         inviteOrIdPorten || initialGuestData.first_name.length === 0,
       allowLastNameEditable:
         inviteOrIdPorten || initialGuestData.last_name.length === 0,
-      // If there is a national ID number (presumably from Feide or ID porten),
+      // If there is a Norwegian national ID number (presumably from Feide or ID porten),
       // already present, then do not allow the user to change the data
       // in the identifier fields
       disableIdentifierFields:
@@ -575,17 +575,17 @@ const GuestRegisterStep = forwardRef(
               </Typography>
               <Typography>
                 <Trans i18nKey="common:guestRegisterWizardText.identityBody">
-                  Enter national identity number if you have one.
+                  Enter Norwegian identity number if you have one.
                   <strong>Otherwise</strong> use passport information.
                 </Trans>
               </Typography>
               <Divider sx={{ marginBottom: '1rem', border: '1px solid' }} />
-              {/* The guest should fill in one of national ID number or passport number */}
+              {/* The guest should fill in one of Norwegian national ID number or passport number */}
               <Controller
                 name="nationalIdNumber"
                 control={control}
                 rules={{
-                  // It is not required that the national ID number be filled in, the guest may not have
+                  // It is not required that the Norwegian national ID number be filled in, the guest may not have
                   // one, so allow empty values for the validation to pass. Note that both "fødselsnummer" and
                   // D-number are allowed as input
                   validate: (value) => isValidFnr(value, true),
diff --git a/greg/management/commands/populate_test_data.py b/greg/management/commands/populate_test_data.py
index f978003624786d70ed7c9daf69864f8d5965ef81..10272594405874d0009c00976a3edcef6aa62803 100644
--- a/greg/management/commands/populate_test_data.py
+++ b/greg/management/commands/populate_test_data.py
@@ -282,7 +282,7 @@ class DatabasePopulation:
 
     def _add_active_person(self):
         """
-        A person with an active role and a verified identity of type national id or
+        A person with an active role and a verified identity of type Norwegian national ID number or
         passport.
         """
         adam = Person.objects.create(
@@ -351,8 +351,8 @@ class DatabasePopulation:
 
     def _add_expired_person(self):
         """
-        A person with an inactive role, and a verified identity of type national id or
-        passport.
+        A person with an inactive role, and a verified identity of type
+        Norwegian national ID number or passport.
         """
         esther = Person.objects.create(
             first_name="Esther",
diff --git a/greg/managers.py b/greg/managers.py
index 30848d3a749143a58404ab0d941ee276e64bfacc..655bee8227e08e8d7f197f54ec9627949aed4f95 100644
--- a/greg/managers.py
+++ b/greg/managers.py
@@ -3,7 +3,7 @@ from django.db.models import Count, Manager, QuerySet
 
 class PersonQuerySet(QuerySet):
     def count_verified_identities(self):
-        # the requirement is minimum one verified passport or national ID number
+        # the requirement is minimum one verified passport or Norwegian national ID number
         # TODO: should we make this configurable or simply outsource the logic
         #       to the systems consuming this data?
         return Count(
diff --git a/greg/models.py b/greg/models.py
index c7c8c369bfcad657673885e8e08ea09758228f4b..425f08a5ae98b635bb5459ac534dc51e58adc901 100644
--- a/greg/models.py
+++ b/greg/models.py
@@ -134,7 +134,7 @@ class Person(BaseModel):
         Due to the diversity of guests at a university institution,
         there are many ways for guests to identify themselves.
         These include Feide ID, passport number, driver's license
-         and national ID card.
+         and Norwegian national ID number card.
 
         Some of these methods are implicitly trusted (Feide ID) because
         the guest is likely a visitor from another academic institution
diff --git a/greg/tests/api/test_person.py b/greg/tests/api/test_person.py
index dc411637cd75d2856c0ae0334816e64fb3884fd1..628977d1c0da8d40be4b8911599c3e82c39a0045 100644
--- a/greg/tests/api/test_person.py
+++ b/greg/tests/api/test_person.py
@@ -696,5 +696,5 @@ def test_identity_post_fails_if_duplicate(client, person, person_foo):
         reverse("v1:person_identity-list", kwargs={"person_id": person.id})
     )
     results = response.json()["results"]
-    # No national ID should have been added
+    # No Norwegian national ID should have been added
     assert len(results) == 0
diff --git a/greg/utils.py b/greg/utils.py
index 1afb6f20868692dc182eafb561eb94b0df43dbae..0a49931fdcdf6650b01f3d34832437c8b0c2ba44 100644
--- a/greg/utils.py
+++ b/greg/utils.py
@@ -14,7 +14,7 @@ def camel_to_snake(s: str) -> str:
 
 def is_valid_id_number(input_digits: str) -> bool:
     """
-    Checks whether the input represents a valid national ID number (fødselsnummer) or a valid D-number.
+    Checks whether the input represents a valid Norwegian national ID number (fødselsnummer) or a valid D-number.
     """
     is_dnumber = int(input_digits[0:1]) >= 4
     return is_valid_norwegian_national_id_number(input_digits, is_dnumber)
@@ -22,7 +22,7 @@ def is_valid_id_number(input_digits: str) -> bool:
 
 def is_valid_norwegian_national_id_number(input_digits: str, is_dnumber: bool) -> bool:
     """
-    Checks whether input_digits is a valid national ID number or D-number.
+    Checks whether input_digits is a valid Norwegian national ID number or D-number.
 
     It is based on the code found here:
     https://github.com/navikt/fnrvalidator/blob/master/src/validator.js
diff --git a/gregui/api/views/invitation.py b/gregui/api/views/invitation.py
index f6e94dc0f4647cd91fda17e5d9dd770756c42f90..05a899c397339bb3fc95a560685bd3798dc03f42 100644
--- a/gregui/api/views/invitation.py
+++ b/gregui/api/views/invitation.py
@@ -283,7 +283,7 @@ class InvitedGuestView(GenericAPIView):
             # If the user is not logged in then tell the client to take him through the manual registration process
             return SessionType.INVITE
         if person.fnr and person.fnr.source == "idporten":
-            # If the user has logged in through ID-porten the national ID number should have been
+            # If the user has logged in through ID-porten the Norwegian national ID number should have been
             # added to the person at this stage
             return SessionType.ID_PORTEN
         if person.feide_id:
@@ -359,7 +359,7 @@ class InvitedGuestView(GenericAPIView):
                 status=status.HTTP_400_BAD_REQUEST,
                 data={
                     "code": "update_national_id_not_allowed",
-                    "message": "Not allowed to update verified national ID",
+                    "message": "Not allowed to update verified Norwegian ID",
                 },
             )
 
@@ -367,7 +367,7 @@ class InvitedGuestView(GenericAPIView):
         # There will always be a name for a user in Feide
         feide_id = self._get_identity_or_none(person, Identity.IdentityType.FEIDE_ID)
 
-        # It is not certain that all fields required will come from Feide, like the national ID number, so
+        # It is not certain that all fields required will come from Feide, like the Norwegian national ID number, so
         # allow updates to empty fields to handle the case where the information is missing from Feide
         # and the user has to enter it manually
         illegal_fields = self._illegal_updates(
@@ -405,7 +405,7 @@ class InvitedGuestView(GenericAPIView):
                 changed_field in ("first_name", "last_name")
                 and session_type == SessionType.ID_PORTEN
             ):
-                # From ID-porten only the national ID-number is given, so the name must be what the
+                # From ID-porten only the Norwegian ID-number is given, so the name must be what the
                 # sponsor wrote, and can be changed
                 continue
 
diff --git a/gregui/tests/api/views/test_invitation.py b/gregui/tests/api/views/test_invitation.py
index 81fd90d60206a83c015f3209e28ca3d3cff22b2d..3e0d7929270ed190574fca6d7b3869e9aa6d47d3 100644
--- a/gregui/tests/api/views/test_invitation.py
+++ b/gregui/tests/api/views/test_invitation.py
@@ -779,7 +779,7 @@ def test_duplicate_national_id(
         value=fnr,
     )
 
-    # Try to respond to an invite with a national ID number that already exists
+    # Try to respond to an invite with a Norwegian national ID number that already exists
     data = {
         "person": {
             "private_mobile": "+4797543992",
@@ -802,5 +802,5 @@ def test_duplicate_national_id(
     assert response_data["code"] == "duplicate_private_national_id_number"
 
     person.refresh_from_db()
-    # The national ID number should still be not set since the post request failed
+    # The Norwegian national ID number should still be not set since the post request failed
     assert person.fnr is None