Summoner Kelvin is reincarnated into another world after sacrificing all his memories for a variety of powerful skills. He's also brought the Goddess who reincarnated him with him, as his own personal summoned monster!
I thought slimes were the weakest monsters! 
And easy to defeat!
ظننتُ أنّ الهُلاميّات هي أضعف
!الوحوش ومن السّهل هزيمتها
Creía que los slimes eran los monstruos
más débiles y fáciles de derrotar.
Creía que los limos son los monstruos
más débiles y fáciles de derrotar.
Le slime, c’est pas censé être
le monstre de base qu’on tue tranquille ?
Pensavo che gli Slime fossero mostri deboli
Por acaso, os slimes não são os monstros
mais fracos e fáceis de derrotar?
Слаймы же должны быть самыми
слабыми! Кого легко победить.