I'm glad you made the comment because at the very least I learned a new German word (native English speaker and conversational in Spanish).
It's ironic to search for "alt meaning" and find a tertiary definition of "Pitched in the first octave above the treble staff; high" which would suggest more of the Spanish "alta" root rather than the Germanic root.
Now I'm curious how much origins are shared between Spanish and German.
Perhaps we can all agree English is a goofy language!