Hi from Paris,
Dear Catherine,
I have started to check as I have names of our "Bundists" living in Paris before WWII and I found already some names.
So you can add "Bundists" in your list of suspicious persons.
May I add that French political police had some agents who learnt Yiddish (as others learnt Italian or Spanish , look how many "Ruiz" are in this archives) in order to be able to understand what was said during meetings.
Khavershaft
Bernard Flam
Archives & History of Medem Center - Arbeter Ring (Bund-Workmen Circle of France)