it screams it to me - wording such as "your concerns are valid", "yes, you're absolutely right..." and "I realize now how important...", and then usage of em-dash
Last time I was trying to be authentically me my response triggered a whole sub-thread about me using the word "subvention" and how funny Europeans sounds to Americans.
I have this too, many words I get from French and turn into English do exist in reality (they sound natural to me) and bam! there you have a snob who wants to show off :)
What is this obsession with the em-dash? For those who used LaTeX it is second nature, and a -- gets changed to an em-dash by a lot of editors or programs such as AutoHotkey