> The guys I know who swear at work tend to be more circumspect around women. But I never noticed any particular backlash against women swearing.

There is this guy nicknamed "Chumbo Grosso" who presented an eponymous police report in the local TV channel. There's a trend toward sensationalist programs in Brazilian TV but this guy was swearing above average. Then they have brought a woman to present part of the program alongside him, to soften his tone.