There are various situations that warrant additional keyboards on your desk, and inputting a second language is definitely a good one. That’s the idea behind KanaChord, which generates Unicode macros to render Japanese Kana characters using chords — pressing multiple keys at once as you would on a piano.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/04/08/kanachord-is-a-macro-pad-for-japanese-input/