[Gelöst] Logo in menu keep switching back

Background of the issue:
I have a logo for the French version of the website (original language) and one for the English version. I am trying to display the correct logo for each language version of my site: versteckter Link.

Symptoms:
The logo in the menu keeps switching back to the English version, even for the French version of the website.

Questions:
Why is the English logo showing on the French version of the website?
How can I ensure the correct logo is displayed for each language version?