I do not know whether Fronto should be known as the first nitpicker of language, but as tutor to the Roman Emperor Marcus Aurelius, he has a good case for the most tenacious (p.129):

To my lord.

Have pity on me, and remove one word from your speech;  I entreat you never to use the word dictio (utterance) when you mean oration.

Farewell, my lord, my immortal glory.  Please give my greetings to your lady mother.

The moral of the story:  one can never escape one’s teachers.  I’m sure Fronto had a red pen.  Stylus.  Thingy.

Unless, perhaps one is Emperor.

To my master.

I shall tomorrow offer my defence of that word, if you remind me.

What’s the Latin for “pwned”?