Any work I get done on the house that might use “imported” labor, I always demand someone be onsite that speaks fluent English. Not just shakes their head “yes” when you talk to them. Oddly enough...I learned this the hard way during a reroofing job.
Had a new roof put on last fall. 6 habla espanol workers and 2 American supervisors. Was done in a day and all debris was removed.
Had tree trimmers on our neighbors property a few years back. They had a problem and really needed help. Like rope and ladder to keep from falling. I tried to help, but they couldn’t understand me nor me them. The foreman came back just in time to accept my offer of climbing rope before one of the guys fell from the tree. It could have gotten ugly. They were obviously not skilled climbers or trimmer, just a couple of guys picked up on the corner looking for day work.
We have a strict policy that no one works on our property unless they can prove they are here legally. They can be seasonal, but the have to have a green card. Learned this during my years running asbestos and lead abatement projects.