I see, I believe I misinterpreted you. But regardless the flag is there to flag incorrect translations.
I now understand your original intent and that’s a good point as well. Coincidentally, there’s a review queue revamp going on right now - Current Projects - April 2025. I’ll collaborate with that team to see if we can add some metadata to the moderator viewing the flagged post. 
As usual, thank you for your sharp observation.
From what I can read, no - agreeing with a custom flag does not penalize the user.