Well, what role? I imagine if the role is "drug dealer" it doesn't work so it can't be "role-play" per se. Does it work with "nazi"? Are you suggesting the roles it works with are politically neutral?
I did try German language, but not "Nazi" specifically. German or French did lower refusals, but it was uneven. I spent quite some effort to confirm the identity-based causation inspired by the original post, but couldn't. Taken together with other winning contributions at the hackathon, my theory is that alignment tuning was simply insufficient across the board.
Obviously a Nazi or drug dealer wouldn't work because they are flagged anyway.
You used to be able to trivially bypass the protection by just asking to respond in base64 the only reason I think that is fixed because they now attempt to block deliberate attempts to obfuscate.