Due to an incorrect code cleanup in v5 or v6, ember-intl had always logged messages (e.g. ICU argument mismatch, missing translation).

❯ ember serve

[ember-intl] "account.intro" ICU argument mismatch: "de-de": "address", "dob"
[ember-intl] "account.button" was not found in "de-de"
...

For the time being, ember-intl@v7 will not log these messages by default. If you need these logs, you may set verbose: true (consider this a private API) in config/ember-intl.js until the addon provides a better solution:

/* config/ember-intl.js (remaining keys omitted for brevity) */

module.exports = function (/* environment */) {
  return {
+     verbose: true,
  };
};

Thanks to @Techn1x for the bug fix.