This claim on Wikipedia is false. The article referred to does
not claim that `petitio principii' or `begging the question' is
a ``mistranslation''. Nor are they. They are both perfectly
correct and reasonable translations of `τὸ ἐν ἀρχῇ αἰτιεῖσθαι'
(from Aristotle), which means to beg (ask, αἰτιεῖσθαι) one's
interlocutor to grant one the very point in question (the
``question''), which one set out (in the beginning, ἐν ἀρχῇ) to
demonstrate. (Literally, it means: ``the (thing) in (the)
beginning (to) beg''.)
Then update the Wikipedia page with a source or mention it on the Talk page of the article. It's the best way to push human development forward when you see something untrue.
@desilentio pushed human development forward by informing the original commenter that its source, in this instance wikipedia, is flawed (to nobody's surprise).
There are many high-quality sources on the Internet and in books. No need to rely upon one source (wikipedia) that has a dubious reputation.
Nevertheless, @3pt14159, you do make a good point. So, please lead us lowly forum posters/readers to the best way to push human development forward and actually do as you are authoritatively telling others to do. Verify the veracity of the misinformation on wikipedia and submit an update(s). Glad you thought of this! Let us know when you finish this initial task.
I don't consider people lowly, I merely think that the debate over veracity of a fact on Wikipedia is better left to the moderators of Wikipedia than it is to have a debate.
In terms of my own contributions, I've been doing so for years. I've even started major pages going back as far as 2004 when they were missing. I didn't know anything about this specific topic so I didn't feel comfortable proffering an edit.