Unknown, but since those scenes weren't even filmed in Iceland, a likely reason is that they simply hadn't gained access to any native speakers for these very minor roles, and just bet on that the target audience wouldn't know (or care about) the difference.
Jason Bourne, Robert Dewey, Heather Lee, Asset, Nicky Parsons, Aaron Kalloor, Craig Jeffers, Director NI Edwin Russell, Malcolm Smith, Las Vegas Security Guard, and others
What is the plot of Jason Bourne?
The CIA's most dangerous former operative is drawn out of hiding to uncover more explosive truths about his past.
What was the budget for Jason Bourne?
$120 million
How much did Jason Bourne earn at the worldwide box office?
$415 million
How much did Jason Bourne earn at the US box office?
$162 million
What is Jason Bourne rated?
PG-13
What genre is Jason Bourne?
Action and Thriller
How many awards has Jason Bourne won?
3 awards
How many awards has Jason Bourne been nominated for?