Umika and the others begin to prepare for the upcoming model rocketry tournament. But they find out that in order to participate, all of them will need model rocket licenses!
Don't you butt in by saying 
or doing anything unnecessary!
!لا تتدخّلن بقول أو فعل أيّ شيء غير ضروريّ
No se metan donde no las llaman.
No metáis las narices
donde no os llaman.
Non immischiatevi
dicendo o facendo cose inutili!
Não quero que se intrometam
nem façam algo desnecessário!
А то ещё скажете или
сделаете что-то не то.