DeSDu'
Kurt Schwitters: glossopoeist and didn't even know it
Kurt Schwitters is an artist known for his collages and, later on, his sound poetry capped off by his quintessential piece: URSONATE (you can listen to it here: https://www.youtube.com/watch?v=6X7E2i0KMqM)
While getting a literature review ready for my thesis, I knew I'd need to cover this giant of sound poetry, recently explored by famed Dutch sound artist Jaap Blonk.
So, I purchase the book pppppp: Kurt Schwitters, a handy collection of his poetry and theory on his sound poetry. It's been quite the entertaining read.

This is such a cool book. If not for the awesome, nonsensical poems it contains, then for the little CONLANG DESCRIPTION on p. 226
It's not a completely functional conlang, to be sure. It actually kind of reminds me of Ro. Each sound represents a specific idea.
The vowels:
a be (have)
o will (desire)
i fear
u not be (not have)
e suspect
The consonants:
b I
d you
m he
n she
g it
p we
t you (pl.)
k they
Vowel length distinguishes meaning too. Vowels are long unless specifically marked as short by the letter c. However, it's not clear how exactly apart from a few specific examples:
ac=yes
uc=no, not
oc=desired, willed, wanted
sh represents emphasis. So:
bash I am very much
mosh he will/wants a lot
Anyway, just a cool nugget of conlang history, stretching back to the 20's and 30's.