When using angular core's translation mechanism, the translate pipe is our friend in the template. But what if we have dynamic parameters? In my case, I had to get the user's email address in a translation.
You can add arguments to the translate pipe!
{{ 'email_notify_text'| translate : { email: currentUser.email } }}"
And in my assets/i18n/en.json
"email_notify_text": "Get notified on {{email}} when there is an update"