From Muppet Wiki

Tingo is the host of Sesame English. Though technically a monster, Tingo resembles a tiger and describes himself as "an international cat." Tingo is multilingual, fluent in 4,000 languages including Spanish, Hmong, Korean, Mandarin Chinese, Vietnamese, and his native "Tingo-ese." Tingo is an exchange student living with his American friend Niki. He's athletic, musical, and hungry, amongst other traits.

Although Tingo's dialogue is recorded in English, 20 to 30 percent of his speech is later translated into the language of the target country.