Resw use the name of the folders for language recognize.
If you have a row in master file (AppResources.resx) that you want to be public and not translate you can add a comment value of 'No translation'. And, if you would like to have different translation for France or Canadian culture.
For example AppResources.resx for master and .resx for shared translations for French. You name all the other files according to the masterfile name. Resx files use the filename for language recognize. For it to work, it requires that you start from a Resx or Resw file that is the master. Visual Studio For Mac/Windows Multilingual Extension This extension is for handling multilingual support in visual studio.