In a future version, it would be great to have the quotas for francophone music taken into account.
You can set your own standard attributes i.e. for language and genre.
By default, attribute values are displayed in the Other Attributes section on the right-hand side of the dialog, in a sample table. Use the cursor-down key to add more rows to the table. If there are any attributes that you use frequently, you can define them as “Standard Attributes” in the configuration, and you will get a much nicer input form on the left-hand side of the dialog.
(tutorials:general:getting-started:v6_3:v6_3_playlist [mAirList Wiki])
In the mAirlist music templates just generate blocks with the amount of special languages or genres you need. You can not only select folders but set filters depending of your special standard attributes like playing only titles with French as Language.