Are the guides bilingual and licensed?
All guides for tours are bilingual (Spanish and English) and have received course work and graduated from a certified guide program. They are licensed by the INC. If they are doing any tours at Machu Picchu, they must have additional courses and certification to do so. Note that most of your guides will also be fluent in Quechua, the language of the native people in rural areas. They may also speak German, French, or other languages.