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:
Etor rum ma pinó: "Ho mamblo ir mombiln rofiró! Mome de flimbor ehengul were." Gwéro, pin rum mamblo ir Rum umbur rofi ir, Mome rum eprif.
Interlinear:
etor  rum ma  pinó
voice PST say 1SG.ALL

ho  mamblo ir  mombiln rofiró
IMP smile  and change  happy.ALL

mome de   flimbor e-hengul were
meal PROG exceed  PL-other many

gwéro    pin rum mamblo ir
this.ABL 1SG PST smile  and

rum umbur rofi  ir
PST be    happy and

mome rum eprif
meal PST decrease