diff --git a/BUILD.gn b/BUILD.gn
index c190f41d4d94..5f3486f9313d 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -220,7 +220,6 @@ if (!is_mac && !is_android) {
           deps = [ "//brave/components/brave_rewards/resources/extension:locales_$locale" ]
 
           locale = string_replace(locale, "-", "_")
-          locale = string_replace(locale, "nb", "no")
           sources = [ "$root_out_dir/resources/brave_rewards/_locales/$locale/messages.json" ]
           outputs = [
             "$brave_dist_dir/resources/brave_rewards/_locales/$locale/{{source_file_part}}",
@@ -231,7 +230,6 @@ if (!is_mac && !is_android) {
         deps = [ "//brave/components/brave_extension/extension/brave_extension:locales_$locale" ]
 
         locale = string_replace(locale, "-", "_")
-        locale = string_replace(locale, "nb", "no")
         sources = [ "$root_out_dir/resources/brave_extension/_locales/$locale/messages.json" ]
         outputs = [
           "$brave_dist_dir/resources/brave_extension/_locales/$locale/{{source_file_part}}",
diff --git a/components/brave_extension/extension/brave_extension/BUILD.gn b/components/brave_extension/extension/brave_extension/BUILD.gn
index ce49b031fda0..d4ef2d70b853 100644
--- a/components/brave_extension/extension/brave_extension/BUILD.gn
+++ b/components/brave_extension/extension/brave_extension/BUILD.gn
@@ -32,7 +32,6 @@ if (is_mac) {
   foreach(locale, locales) {
     bundle_data("brave_extension_framework_bundle_data_${locale}") {
       locale = string_replace(locale, "-", "_")
-      locale = string_replace(locale, "nb", "no")
       sources = [
         "//brave/components/brave_extension/extension/brave_extension/_locales/$locale/messages.json"
       ]
@@ -51,7 +50,6 @@ if (is_mac) {
   foreach(locale, locales) {
     copy("locales_${locale}") {
       locale = string_replace(locale, "-", "_")
-      locale = string_replace(locale, "nb", "no")
       sources = [
         "//brave/components/brave_extension/extension/brave_extension/_locales/${locale}/messages.json",
       ]
diff --git a/components/brave_extension/extension/brave_extension/_locales/no/messages.json b/components/brave_extension/extension/brave_extension/_locales/nb/messages.json
similarity index 100%
rename from components/brave_extension/extension/brave_extension/_locales/no/messages.json
rename to components/brave_extension/extension/brave_extension/_locales/nb/messages.json
diff --git a/components/brave_rewards/resources/extension/BUILD.gn b/components/brave_rewards/resources/extension/BUILD.gn
index e547ee1792bd..dc290c0a7f33 100644
--- a/components/brave_rewards/resources/extension/BUILD.gn
+++ b/components/brave_rewards/resources/extension/BUILD.gn
@@ -56,7 +56,6 @@ if (is_mac) {
   foreach(locale, locales) {
     bundle_data("framework_bundle_data_${locale}") {
       locale = string_replace(locale, "-", "_")
-      locale = string_replace(locale, "nb", "no")
       sources = [
         "brave_rewards/_locales/$locale/messages.json"
       ]
@@ -75,7 +74,6 @@ if (is_mac) {
   foreach(locale, locales) {
     copy("locales_${locale}") {
       locale = string_replace(locale, "-", "_")
-      locale = string_replace(locale, "nb", "no")
       sources = [
         "brave_rewards/_locales/${locale}/messages.json",
       ]
diff --git a/components/brave_rewards/resources/extension/brave_rewards/_locales/no/messages.json b/components/brave_rewards/resources/extension/brave_rewards/_locales/nb/messages.json
similarity index 100%
rename from components/brave_rewards/resources/extension/brave_rewards/_locales/no/messages.json
rename to components/brave_rewards/resources/extension/brave_rewards/_locales/nb/messages.json