Labels in Tasks View not available for translation

Current Situation

• In Tasks tab, bloc mode, we have "0 of 1 Tâche en cours d'exécution" ("running tasks").
• There is no label in the i18n package for the Englisch word "of".

Desired Behavior

• The ´word "of" should be available from a label.
• The French translation should be: "0 de 1 Tâche en cours d'exécution"