diff --git a/frontend/public/locales/en/common.json b/frontend/public/locales/en/common.json
index 1b77253ef3b6b418738a351db53e1d800f514bda..17d4cc40b6e72f63f7691aa19bfbdf7d64db4f6a 100644
--- a/frontend/public/locales/en/common.json
+++ b/frontend/public/locales/en/common.json
@@ -18,7 +18,7 @@
   "firstName": "First name",
   "lastName": "Last name",
   "dateOfBirth": "Date of birth",
-  "nationalIdNumber": "Fødselsnummer",
+  "nationalIdNumber": "National ID number",
   "validation": {
     "invalidIdNumber": "Invalid national ID number",
     "nationalIdNumberRequired": "National ID number required"
diff --git a/frontend/public/locales/nn/common.json b/frontend/public/locales/nn/common.json
index 35f9fbc39df980a6273ccdf3581b4f66139ffc08..2499cfe2bf29b5f8bb84875a6a3de1b15e08c298 100644
--- a/frontend/public/locales/nn/common.json
+++ b/frontend/public/locales/nn/common.json
@@ -19,6 +19,7 @@
   "firstName": "Fornamn",
   "lastName": "Etternamn",
   "dateOfBirth": "Fødselsdato",
+  "nationalIdNumber": "Fødselsnummer",
   "validation": {
     "invalidIdNumber": "Ugyldig fødselsnummer",
     "nationalIdNumberRequired": "Fødselsnummer er påkrevd"
diff --git a/frontend/src/routes/register/index.tsx b/frontend/src/routes/register/index.tsx
index 57d0e3cee163ddd76b3a0f02dcafa4d5f2885713..113a13dd488f88b9062d94c351fede75a9fdf0ca 100644
--- a/frontend/src/routes/register/index.tsx
+++ b/frontend/src/routes/register/index.tsx
@@ -60,7 +60,7 @@ export default function Register() {
         />
         <StyledInput
           {...register("national_id_number", {
-            required: t('validation:nationalIdNumberRequired').toString(),
+            required: t('common:validation.nationalIdNumberRequired').toString(),
             validate: isValidFnr
           })}
           placeholder={t('nationalIdNumber')}