Most countries don't use ABCDEFG for note names (Solfège)

Why does Germany have an H note? https://youtu.be/hlafE9fm4_g?si=DP_xOkOo-M3iGeOq 📌1:45 I had stupidly written "D diesis" rather than "Re diesis"! Shows how used to the English system I am! Thank you to the commenter who brought it to my attention. I have now blurred the mistake out using the YouTube editor tool (although it might take a while for that change to process). Sorry for any confusion caused! SOURCES: How music theory works in different countries, Classic FM: https://www.classicfm.com/discover-music/music-theory/music-theory-different-countries/ 12tone, why do notes have names?: https://youtu.be/BBbhfRfQIMM Early Music Sources, Solmization and the Guidonian hand in the 16th century: https://youtu.be/IRDDT1uSrd0 Felix Rogge, The note 'H' exists!: https://youtu.be/YvT10X7_03s Moveable Do: https://www.aaronshearerfoundation.org/solfege/#:~:text=The%20Fixed%2DDo%20Chromatic%20Syllable%20System%20has%20proven%20to%20be,a%20distinct%20and%20permanent%20name. Do-re-mi, from “The Sound Of Music”, in Spanish: https://youtu.be/SnL94BLgUkE?si=HvXSzT5uCHvdF3z_ https://www.eldoblaje.com/musical/SONRISAS%20Y%20L%C3%81GRIMAS.pdf Guitarrista Paso a Paso, Acorde Si bemol menor: https://www.youtube.com/watch?v=SrFGhezqcAs Ut queant laxis - Gregorian Chant: https://www.youtube.com/watch?v=iMSRLWsAWHI The outro music to this video is my track "Mothers Day" which you can hear in full on Spotify: https://open.spotify.com/artist/0wKKJoOZd8JQJDgGU8sb8V?si=dcs5zn4JRDO7oVCEkfK6YQ 🎶 And, an extra special thanks goes to Peter Keller, Douglas Lind, Vidad Flowers, Ivan Pang, Waylon Fairbanks, Jon Dye, Austin Russell, Christopher Ryan, Toot & Paul Peijzel, the channel’s Patreon saints! 😇 SUPPORT ME ON PATREON: https://www.patreon.com/davidbennettpiano 🎹 0:00 What is Solfège? 2:53 Where did "Do Re Mi Fa Sol La Si" come from? 5:36 Ti vs. Si 6:40 Movable Do vs. Fixed Do 9:58 The Sound Of Music 13:00 Conclusion