We are using WebLate to do translation works:

Workflow

1. Go to Weblate to improve current translations or add new translations.
2. There are still some texts which are not translatable. Here's the way:
   1. Add a key in lib/l10n/intl_en.arb
   2. Replace the text with AppLocalizations.of(context).yourNewKey in the widget
   3. Submit a pull request. After merged, these texts would be translatable at Weblate.

Status