[DarkMaster]

If you ever play a MMORPG, like FFXI, almost every single player in the game knows domo arigato gozaimasu and various other japanese words and phrases, like kudasai and a few others I don't remember right now. These are common words, but also quite basic. English players memorize them to help speak with Japanese players, likewise the Japanese players will memorize "thank you. welcome. hello. please." etc. So in the movie, she's pretty much just displaying a basic knowledge of the language, nothing more.