Ah yes. Fluent English is required to interpret "right lane closed."
Here's the thing about you MAGAs: you're always saying that X or Y needs to be done because otherwise catastrophe. But you have no explanation for how we've managed to avoid that catastrophe for generations without doing your stupid MAGA things. Like Trump says that Canada doesn't work as a country, only as a state. Oh, really? So the last 125 years of it working as a country just didn't happen?
Same thing here: we've had immigrant truck drivers for generations. Somehow they've managed to do their jobs just fine up until now. Are you telling us that the accident rate for non-fluent English speakers is particularly high? Link?
Probably you don't know that there's so much automation in truck cabs these days that no driver has to interpret signs on his own. Not only does the computer system recognize it, but it literally will not let the driver ignore the sign's instructions (or at least makes it very difficult and perhaps costly to do so).