Button Caption is showing HTML code

There are two buttons showing HTML code instead the right text.

Steps to reproduce:

• Firstly, change JIRA language to French (France);

When subscribe to a filter:

• In the Issues menu (Demandes in French), select Gérer les filtres (Manage filters);
• Click on S'abonner at the right of the screen (Subscribe);
• The button "S'abonner" is wrong:
  

When you want to modify a subscription to a filter:

• In the Issues menu (Demandes in French), select Gérer les filtres (Manage filters);
• Click on Subscription at the right of the screen (1 Abonnement);
• Select the option to modify (Modifier);
• The button "Mettre à jour" is wrong: