• Date Of Birth: March 12, 1981
  • Date Of Death: March 4, 2021
  • Occupation: Polyglot, language coach and youtuber
  • City: Phoenix
  • State: Arizona

Moses Monweal McCormick (March 12, 1981 – March 4, 2021), also known as Laoshu (from Chinese: 老鼠; pinyin: lǎoshǔ, transl. mouse) or Laoshu505000, was an American polyglot and YouTuber.

McCormick gained popularity by speaking several languages with native speakers that he met in public places, and uploading the videos on his YouTube channel. He called this activity leveling up.

McCormick taught language lessons remotely over the Internet, over time developing his own language learning method, which he called FLR (Foreign Language Roadrunning).

The foreign language in which McCormick was most fluent was Mandarin Chinese. He also spoke around sixty languages at a basic conversational level, including Japanese, Vietnamese, Cantonese, Korean, Somali, Spanish, and Swahili.

McCormick died on March 4, 2021, in Phoenix, Arizona, from a heart complication. – Available under the Creative Commons Attribution-ShareAlike License from Wikipedia.