Just a couple minutes in, and this is already hilarious.
I am pretty sure this is not a translation issue.
The extremely feminine main character was wearing armor that technically concealed that she had boobs. Alright, fine. I'll buy that the thieves couldn't tell she was a girl. I'm sure there's plenty of femboy warriors who wear skintight outfits and chestplate in whatever this time/place is.
Then they
took her clothes and armor off and replaced it with a ragged tunic and the MC says, approximately, "thank goodness for their sloppy body check. They didn't notice I'm female."