fix locale-utils unsupported lang uncaught err

controllers/email-l10n.js

@@ -122,10 +122,12 @@ function previewEmail2022 (req, res) {
 
 function sendTestEmail (data) {
   return async function (req, res) {
-    const subject = LocaleUtils.fluentFormat(req.supportedLocales, data.subjectId)
+    // const supportedLocales = [req.user.signup_language, 'en'].filter(Boolean) // filter potential nullish signup_language, fallback to en
+    const supportedLocales = req.supportedLocales // this varies from send-email-to-unresolved-breach-subscribers.js (the line above) in order for QA to switch lang from browser
+    const subject = LocaleUtils.fluentFormat(supportedLocales, data.subjectId)
     const context = {
       whichPartial: data.whichPartial,
-      supportedLocales: req.supportedLocales,
+      supportedLocales,
       primaryEmail: req.user.primary_email,
       breachStats: req.user.breach_stats
     }

locale-utils.js

@@ -67,9 +67,11 @@ const LocaleUtils = {
   fluentFormat (supportedLocales, id, args = null, errors = null) {
     for (const locale of supportedLocales) {
       const bundle = fluentBundles[locale]
-      if (bundle.hasMessage(id)) {
+      try {
         const message = bundle.getMessage(id)
         return bundle.format(message, args)
+      } catch (e) {
+        continue
       }
     }
     return id

scripts/send-email-to-unresolved-breach-subscribers.js

@@ -6,7 +6,7 @@ async function sendUnresolvedBreachEmails () {
   const subscribers = await DB.getSubscribersWithUnresolvedBreaches()
 
   subscribers.forEach(async subscriber => {
-    const supportedLocales = [subscriber.signup_language, 'en'].filter(Boolean) // filter potential nullish signup_language
+    const supportedLocales = [subscriber.signup_language, 'en'].filter(Boolean) // filter potential nullish signup_language, fallback to en
     const subject = LocaleUtils.fluentFormat(supportedLocales, 'email-unresolved-heading')
 
     await EmailUtils.sendEmail(subscriber.primary_email, subject, 'email-2022',