[مغلق] Translations

Background of the issue:
I am trying to ensure that when a user logs in with valid credentials on the English store, the login works successfully. However, after switching the language from English to French, the site redirects the user back to the login page instead of keeping the session active. Here is a screenshot of the issue: الرابط المخفي. The issue can be seen on these pages: الرابط المخفي and الرابط المخفي.

Symptoms:
After switching the language from English to French, the site redirects the user back to the login page instead of maintaining the session.

Questions:
Why does switching the language from English to French cause the site to redirect back to the login page?
How can I maintain the user session when switching languages?