Expecting visitors from all races to come calling after learning that Rimuru now controls the entire Great Forest of Jura, Rimuru decides to hold a festival to introduce himself and Tempest to the world, with the goal of attracting new citizens.
Just what kind of 
"explanation" did you give them?
ما طبيعة "الشّرح" الّذي قدّمته لهم؟
Wie hat der es ihnen bitte erklärt?
Explicación
Explicación
EXPLICATION
Chissà che razza di spiegazione avrà dato...
Que tipo de "explicação" você deu a eles?