I've been doing this job for about five years now, and the one thing that I really encourage myself to do is to be strong and to ask the tough questions and to say what people don't like to hear. What I talk about is not popular. I know I have a target on my back for what I say, because I'm not politically correct. I go straight to the point.
If you're going to do this, yes, you do need strong language, but you also need a strong champion to call out the lack of transparency and accountability or the lack of reporting thereof.