Sometimes errors do occur, I agree. But as a guy who works in that industry I have experienced Producers requesting mispronunciations to be cut rather than go out, and on several occasions re-recorded. Which is never easy. Because even when you get the same voice actor in the studio there are differences in tone varying from very subtle to quite obvious. Especially when accents were. Adding the odd phrase is easier, but trying to marry up a new sample, sandwiched between others, it almost always sounds a little bit... off.

I understand what you are saying.
My meaning (above) was that sometimes accents and such as incorrect pronunciation are DELIBERATELY used - better not shout it gives me an 'ed ache. Many productions in theatre, cinema and TV have deliberate 'mistakes' - for that matter, so do books.
Marrying up samples can be a nightmare true! In fact I have had a small amount of experience with this in the past as an amatuer video producer. Inserted voice edits can seem tiny at first then sound terrible later. This is not what I mean though.
I am writing about deliberate, scripted dialogue where the actor pronounces a word in a way that some may see as incorrect and others may not or where, in character, the actor uses a 'faked' accent or way of speaking and pronounces in the way the script or director demands.
An example would be an Australian actor speaking in a Scottish accent but trying to make the listener belief that the actor is really Scottish or maybe where a cokney accented person reads the news in RP or flip that round!
I'm sure you know 'Eastenders' or 'Coronation Street' and how the actors on those shows speak compared to say 'Jeeves and Wooster'. Imaging putting a 'Jeeves and Wooster' type accent in place of a cockney accent of 'Eastenders'! (Actually - that gives me a voice over idea - lol!)
I'm really not disagreeing with you - just looking at the issue from a different angle.

I here tell that 'archmage' is pronounced in game in different ways just as it is in life. This would probably not be a mistake, rather a reflection by the makers on / of real life.
Happy daze!
Sorry guys, I have to go as I am being called and need to rest - may be back latter.
This has been a great thread so far.
I have not linked the TV shows as I have not the time - being called away and all. The shows are easily found online if ya look about.