[Closed] Automatic translation and admin language

Background of the issue:
I am trying to use automatic translation with WPML. We found a bug with automatic translation and admin language. As soon as there are products under automatic translation, the admin language of the back office keeps changing. The default language is French, but it changes to English, then to Portuguese. We didn't have this problem before with the automatic translation disabled.

Symptoms:
The admin language of the back office keeps changing unexpectedly when automatic translation is enabled. The default language is French, but it changes to English and Portuguese.

Questions:
Why does the admin language keep changing when automatic translation is enabled?
How can we stop the admin language from changing unexpectedly?