I encourage *all* students to ask if they don't understand a word. I also share with the students that English isn't my first language (actually my 3rd). We've had students come from all over and sometimes I am able to explain a word or concept in their language (this works great for students where Spanish is their primary language as well as many of the students from Africa where Italian or French is part of their language). I also draw on my experience from the time I was the one learning English. We frequently have discussions about nursing and health care practices in other countries and this allows those students to teach the rest of the class as well as teach me something new!