YOU SAID:
https://musiclab.chromeexperiments.com/Shared-Piano/#X2ohYaTIO
INTO JAPANESE
https://musiclab.chromeexperiments.com/Shared-Piano/#X2ohYaTIO
BACK INTO ENGLISH
https://musiclab.chromeexperiments.com/Shared-Piano/#X2ohYaTIO
INTO JAPANESE
https://musiclab.chromeexperiments.com/Shared-Piano/#X2ohYaTIO
BACK INTO ENGLISH
https://musiclab.chromeexperiments.com/Shared-Piano/#X2ohYaTIO
You've done this before, haven't you.