Diachronic conlangs seem to be trendy. This is a primative sound mutator, but you can tune it if you want. As an added plus, you can see an example of the result with example text of your choice. Someday I'll support multiple mutations, such as reduplication and gemination. Someday.

a
e
i
o
u

j
k
l
m
n
p
s
t
w

o : a
olin : acoq
open : ameq
ona : aqi
oko : ara
lon : caq
loje : cave
len : ceq
lete : ceye
la : ci
laso : cija
lape : cime
lawa : cisi
li : co
lili : coco
lipu : comu
linja : coqvi
lupa : cumi
luka : curi
lukin : curoq
e : e
esun : ejuq
en : eq
ale : ice
ala : ici
alasa : iciji
anpa : iqmi
anu : iqu
ante : iqye
akesi : irejo
awen : iseq
sona : jaqi
soweli : jaseco
selo : jeca
seli : jeco
sewi : jeso
seme : jete
sama : jiti
sin : joq
sina : joqi
sinpin : joqmoq
sike : jore
sijelo : joveca
sitelen : joyeceq
suli : juco
supa : jumi
suno : juqa
suwi : juso
pona : maqi
poka : mari
poki : maro
pali : mico
palisa : micoji
pan : miq
pana : miqi
pakala : mirici
pi : mo
pilin : mocoq
pipi : momo
pini : moqo
pimeja : motevi
pu : mu
ilo : oca
insa : oqji
ike : ore
ijo : ova
noka : qari
nena : qeqi
nasa : qiji
nasin : qijoq
nanpa : qiqmi
namako : qitira
ni : qo
nimi : qoto
ko : ra
kon : raq
kepeken : remereq
ken : req
kala : rici
kalama : riciti
kasi : rijo
kama : riti
kili : roco
kipisi : romojo
kin : roq
kiwen : roseq
kule : ruce
kulupu : rucumu
kute : ruye
weka : seri
walo : sica
waso : sija
wan : siq
wawa : sisi
wile : soce
moli : taco
monsi : taqjo
moku : taru
meli : teco
ma : ti
mani : tiqo
mama : titi
mi : to
mije : tove
musi : tujo
mun : tuq
mute : tuye
unpa : uqmi
uta : uyi
utala : uyici
jo : va
jelo : veca
jan : viq
jaki : viro
toki : yaro
tomo : yata
telo : yeca
tenpo : yeqma
taso : yija
tan : yiq
tawa : yisi
tu : yu

yeca co iqmi yiq motevi sica juco
to mocoq e sija caq mari to
sija co yisi raq co yisi ti curi curi seri siq
to remereq e qoto remereq ici riciti
sija co iciji e raq to

sija co yisi iqmi yisi ti iqmi
co yisi raq caq joyeceq cime to
co yisi jeso e to. to cime.
sija co yisi e to yiq joveca to.
to seri e qo.

to tuye co yisi raq caq jeso qeqi ti
caq yeca sisi.
to curoq e rijo juco qo:
rijo co yisi sisi yiq sisi mo raq eq yeca
ti yata co cime roseq

viq mo sisi raq co miqi e curi yisi qo:
viq co miqi e qoto yaro yisi viq mo ara siq.
to curoq e yeqma moqo e yeqma qo
e yeqma riti jiti siq jiti yeqma mo ici uyi.

to req curoq e ti yeca mo sisi raq
e qijoq mo jaqi ici caq joveca to.
viq mo roseq eq rijo co yisi tujo caq jore to.
yeqma ice ci qo co joyeceq cime iqu jete?