I hasten to please you, here is a quote from the official site creators of this cartoon:
"While the 31 series “Masha and the Bear” - Russian animated series about a little girl funny relationship with an adult, but the good beast - is preparing to release the first 30 episodes had translated into English for the audience from the U.S.
In Russia Masha’s voice is a voice of young star Alina Kukushkina. In America, on the role of Masha picked up a girl who is suitable for the character not only voice and character, but also looks very similar to Alina. Elsie Fisher, previously it was the voice of Agnes in a cartoon “Despicable Me” 