I dunno but in d1 I was a big prison of elders, Siva and Fallen fan in general. Variks voice lines were my favorite so when I heard Variks speak in the trailer I noticed he learned some grammer. I thought it was a nice character development, but still gonna miss that special grammer. or atleast way to speak
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I don't think he learned better grammar, I'm pretty sure he already knew "proper" grammar before this, he just chose to speak in "broken" grammar to seem less threatening to guardians, we know what they're capable of after all. If he appeared less threatening, there was definitely less of a chance he would get a bullet to the head.