Good points above about the R/T over there.It is in English but.....You can get used to it by listening to Live ATC on the internet.Las Vegas is one of the airports covered
I was once priviledged to be invited to the sharp end of a UK registered B747 for the approach to LAX.A very friendly Captain asked me to help out with interpretation of the radio traffic.I don't think he was entirely serious but he did idicate that it can be difficult to follow at busy times.