This is painful to admit, but... I do this as well. Even if it is trivial, and even if they aren't actually speaking the dialect native to the setting, but are instead speaking English with the accent of that dialect (which sounds like a silly thing to not purchase a game over), it does make a big difference to me regarding the immersion. The smooth Russian narrator in Black Book or the voice lines in Stronghold (one) gave them a lot of charm, and its one of the reasons why I was anticipating the release of the Australian Broken Roads. When a lot of media translated into English becomes a homogenised with a standard language, which is a reasonable decision to make as it allows as mant people as possible to comprehend your product, it can become tired rather quickly. That specificity in the creation process gets a bonus from me.

In order of preference, I would prefer the native tongue with subtitles, then the accent of the depicted people speaking in English, and last a translation and voiceover in the accent of the expected consumer (American English normally.)

But here's the kicker. Would I be more lenient regarding this criticism if the standard language of choice was my own personal accent, British English? ...Almost certainly yes. The incongruence would be less overt if this were the case. I can admit the slight hypocrisy in my stance. But in knowing my bias, I can consciously try to be more true to the principle.