After changing the User Language preference, Activity Stream in Macro Browser does not change accordingly

Steps To Reproduce

1. Set user's language preference to German
2. Edits a page and opens the macro browser
3. Now the user changes the language in his individual settings to "français (France)".
4. Edits a page again and opens the macro browser (screenshot_2.png):

Actual Behavior

While in German:

• Activity Stream Macro in Macro Browser still in English (label 1)
• Other Macro still in German (label 2)
• All label in German (label 3)

After changed to French:

• Activity Stream Macro in Macro Browser still in English (label 1)
• Other Macro still in German (label 2)
• Some label in German (label 3)
• Some label in French (label 4)

After clearing browser's cookies and caches:

• Activity Stream Macro in Macro Browser still in English (label 1).
• Macros in French (label 2)
• All label in French (label 4)

Workaround

Delete browser's cookies and caches and restart Confluence. Delete browser's cookies and caches is not enough to fix the issue