In honor of Anton Yelchin, I have a question about Pavel Chekov.
Chekov's Russian accent is irregular. Apparently, Walter Koenig based the accent on that of his father, who had difficulty with the "v" sound. Yelchin would continue using this accent when he took over the character.
Since his accent is not normal in the real world, is it considered normal in the Star Trek world? Has it ever been lamp-shaded or remarked upon, in-universe?