For someone who doesn't know the characters in other writing systems such
as those of India , it would be a fair bit of work to look up the
transliterations of all the characters for each layout. With that in mind,
I'm quite curious (especially as a Dvorak-layout user) whether most of
these keyboard layouts are based in some reasonable fashion on the
language(s), such as placing the most-commonly-typed characters in the
middle row in a sensible order.
What I dearly hope is not so is that typical character layouts follow the
"qwerty/qwertz/azerty" tradition, assigning characters to similar-sounding
Latin letters in those layouts.