diff --git a/apps/portal-shell/project.json b/apps/portal-shell/project.json
index 9868da0..70eab48 100644
--- a/apps/portal-shell/project.json
+++ b/apps/portal-shell/project.json
@@ -38,6 +38,7 @@
       "configurations": {
         "production": {
           "localize": ["en", "fr"],
+          "i18nMissingTranslation": "error",
           "budgets": [
             {
               "type": "initial",