On grammatical class:

by
letteral for b.
cy
letteral for c.
dy
letteral for d.
fy
letteral for f.
ga'e
upper-case letteral shift.
ge'o
shift letterals to Greek alphabet.
gy
letteral for g.
je'o
shift letterals to Hebrew alphabet.
jo'o
shift letterals to Arabic alphabet.
jy
letteral for j.
ky
letteral for k.
lo'a
shift letterals to Lojban (Roman) alphabet.
ly
letteral for l.
my
letteral for m.
na'a
cancel all letteral shifts.
ny
letteral for n.
py
letteral for p.
ru'o
shift letterals to Cyrillic alphabet.
ry
letteral for r.
se'e
following digits code a character (in ASCII, Unicode, etc.).
sy
letteral for s.
to'a
lower-case letteral shift.
ty
letteral for t.
vy
letteral for v.
xy
letteral for x.
y'y
letteral for '.
zy
letteral for z.
abu
letteral for a.
denpa bu
letteral: Lojban "." character.
ebu
letteral for e.
ibu
letteral for i.
joibu
letteral: ampersand character; especially used in standing for a mixed connective.
obu
letteral for o.
pau bu
letteral: '?' symbol
saibu
letteral: '!' symbol
slaka bu
letteral: Lojban "," character.
ubu
letteral for u.
uibu
letteral: happiness symbol (letteral).
ybu
letteral for y.
zo'obu
letteral: humor symbol, ":-)" and its related forms expressing humor (letteral).