English is the most common second language in the world, but there are plenty of locations to visit where English speakers may run into language barrier issues. One way to overcome this hurdle is to utilize various online resources. For example, booking hotel reservations, rental car and other accommodations can help avoid miscommunications during travel. For more tips, check out the below graphic.
Graphic created by Valencia Travel, offering vacations to Machu Pichu including a salkantay trek trip.