When Daniel and Patrick are fighting near the end of the film, their guns start out as 9mm automatics, but alternate between being revolvers and automatics as the scene progresses.
It's understandable that an American facility in Mongolia would have interior signage in English. It's far less understandable why the local Mongolian cop would be driving a car with "POLICE" on the door in English only but nothing in Mongolian. The health facility in the tiny village also has a sign "HOSPITAL" only in English. At 34:51 a local vehicle license plate has European numerals and letters, but nothing in Mongolian.
Minutes after Daniel tells the doctors the roads are unsafe at night (as they belong to the smugglers), they set up camp with a bright bonfire next to their car, just off the road - sure to attract the smugglers' attention.