Wookiee
The Wookiee language is Shyriiwook. Wookiees are capable of understanding English but cannot speak it. In the original Star Wars trilogy Chewbacca showed he could understand humans. His human partner, Han Solo, also shows knowledge of Shyriiwook. In the Star Wars expanded universe books, Chewbacca builds a miniature translator droid ("Em Teedee") for his nephew Lowbacca. When Lowbacca begins training as a Jedi the droid helped him communicate with his fellow students.