[Решено] WPML and The Events Calendar.

Background of the issue:
I am trying to display the status of past events on my site скрытая ссылка using WPML and The Events Calendar. The string for the event status is not translated into all languages.

Symptoms:
The status 'The event has passed.' is only shown in English unless 'Automatically mark strings for translation' is active.

Questions:
Why is the event status not translated, although the correctly translated string can be located?