Translation of "Smile" (#conlang Challenge of the Week (CotW))

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Original: A voice said to me: "Smile and be happy! Things could be worse!" So I smiled And was happy. And things got worse.
Translation:
Ethol moir tentoío: «Leironús, ar mereð-séilig sús! Pethain poloín chenogosc sí!» Path, leironoí, Ar mereð-séilig foi, Ar pethain chenogoscoín.
Interlinear:
Ethol
voice
mo-ir
me-DAT
tent-o-ío:
say.3SG-PST
«Leiron-ús,
Smile.2SG-IMP
ar
and
mereð-séil-ig
good-sun-ny
sú-s!
be.2SG-IMP
Peth-ain
thing.NPL
pol-o-ín
can.3SG-PST
chenog-osc
bad.more
sí!»
be
Path,
Thus
leiron-oí,
smile.1SG-PST
Ar
and
mereð-séilig
good-sunny
fo-i,
be.1SG-PST
Ar
and
peth-ain
thing.NPL
chenog-osc-o-í-n.
bad-more.3PL-PST