In Marvel's "Guardians of the Galaxy", Vin Diesel plays Groot, a giant tree-like creature whose only line of actual dialog is "I am Groot." Thus, when the movie was translated into different languages, Diesel was able to handle his own dubbing. And Marvel was smart enough to film Diesel in a recording studio, saying "I am Groot" in several languages... then put it all on YouTube.

They posted videos of Vin saying it in French, Russian, Spanish and Brazilian Portuguese. 

Brazilian Portuguese




Mandarin Chinese (plus all the others)

Guardians Of The Galaxy Trailer