Directory names on Nextcloud not accessible

Hello,

I have following problem. Using the standard file explorer, I can not access direclty all folders on my Nextcloud, some of the folder are not visibles. However, in the Nextcloud Webspace they are available. I can access to the files, when writing myself the folder name.

Also, some folder names are indicated in the Web environment with a kind of translation to French. For instance, the coorect folder name ā€œSTAGE FORMATIONā€ is translated to ā€œFORMATION DE SCENEā€, or ā€œMON COURS PREMIEREā€ becomes ā€œLUN COURS PREMIEREā€, I guess, MON ist interpreted as ā€œMONDAYā€ and translated to ā€œLUNā€(di) which is monday in French. I have somehow the feeling, that both topics are related?
Below Screenshot is illustrating both issues:

  • ā€œSTAGE FORMATIOā€ becomes ā€œFORMATION DE SCENEā€ on the Web environnement
  • ā€œPremiĆØre rĆ©formeā€ is not available in the Explorer
    Any help is appreciated.