The extensions of the Zoitei writing system are added with the character '.
These extensions indicate an alternate sound.
| 4L | 5L | 6q | 7q |
| 0s | l' | p' | f' | þ' (th') |
| 1s | c' | t' | s' | š' (sh') |
| 2s | r' | k' | x' | ł' (lh') |
| 3B | m' | b' | v' | w' |
| 4B | n' | d' | z' | ž' (zh') |
| 5B | ŋ' (q') | g' | ň' (nh') | ř' (rh') |
| IPA | English word | Zoitei Romanized Phonetic Spelling |
| l' | ʙ̥ | - | - |
| p' | pʼ | - | - |
| f' | ɸʼ | - | - |
| th' / þ' | ɸ | - | - |
| c' | ɾ | - | - |
| t' | tʼ | - | - |
| s' | ɕ | - | - |
| sh' / š' | ʂ | - | - |
| r' | r | - | - |
| k' | qʼ | - | - |
| x' | h↓ | - | - |
| lh' / ł' | ʜ | - | - |
| m' | ʙ | - | - |
| b' | ʘ | - | - |
| v' | ⱱ̟ | brr | b'yb'yh |
| w' | β | - | - |
| n' | ψ | - | - |
| d' | ǀ | tsk | d' |
| z' | ʑ | - | - |
| zh' / ž' | ʐ | - | - |
| q' / ŋ' | ɭ | hangul | xanguŋ' |
| g' | ǃ | - | - |
| nh' / ň' | x | loch | loň' |
| rh' / ř' | ʢ | - | - |
r': Rolled r
c': Sound between l and r
nh' / ň': ł with stop
rh' / ř': Rolled ř
lh' / ł': Rolled ł, long k
th' / þ': Long p, similar to an f (halfway between p and f)
w': Long b, similar to a v (halfway between b and v)
p': Pop sound (ejective p)
t': Tick sound (ejective t)
k': Click sound (ejective k)
l': Unvoiced buzzing sound (trilled p)
m': Buzzing sound (trilled b)
b': "Kissing" Click
d': "Tsk" Click
g': Back of mouth click
x': Gasp / breath in
q' / ŋ': Rolled tongue l
s': Between s and š / sh
z': Between z and ž / zh
sh' / š': Rolled tongue š / sh
zh' / z': Rolled tongue ž / zh
f': Long b' (non-click variant)
v': Shiver noise