So I've been curious about this topic for a while now, and its related to people who do not speak English natively mispronouncing words that have a V or W in them. For instance, they will say Woice rather than voice, or something like vhere is the bathroom; that's veird. Probably the most famous example I know of is Walter Koenig as Chekov saying nuclear wessels in star trek IV - the voyage home.
Anyway, I'm curious where this stems from, I know other languages do use these letters differently, but they tend to use other English constructs correctly. So, my question is, why does this hang up happen? Is it just a habit formed by using the V and W differently in your language, so it just feels more natural this way? Is it just not knowing how to pronounce the V and W in english? The thing is, I've heard people use these correctly in one sentence, and then incorrectly a few sentences down the road, so I'm confused about the confusion.