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They don’t have forum accounts.
TBF, they barely have CG accounts at all: they only solve community puzzles in the exact same language as the puzzle author.
CG’s been notified last time already, but have apparently chosen not to act on it.
Thank you for the gentle reminder.
Indeed, those two accounts are fake accounts. I’ve tried to investigate and understand from which regular account they could come, without result for now.
I’ve removed their moderation rights. The approvals they’ve done can’t be easily undone though.