Swearing just changes the dynamic when used in a professional setting (in the US). It is casual, widely interpretable use, generally negative language. At wors

Swearing just changes the dynamic when used in a professional setting (in the US). It is casual, widely interpretable use, generally negative language. At worst, if targeted to a person, project, or role it immediately heightens the tension in the relationship. At best, it is used to emphatically describe something ("this code is a bit shitty") but again because of swear words generally inflammatory nature it can be interpreted poorly.