I thought we got past the era of unnecessary Japanese words in a translation.

Just say Mother!
Just say Little sister!
Just say Thank you!

"Oh, but it leaves the feelings of what the original author was trying to convey."

DUDE! The setting is in a non-descript European country! Japanese words don't belong there and ruin the actual intended feeling the author was trying to convey.

nice

Well so far you're a average MC. So at least you got that right.

Yeah, the god did what he promised, he made her average creature in that world. Dragon + Person and divide into half. 6800.
It is her fault to not wish to be average human

You save the future of humanity and then God fucks up what you agreed on with him.

@Mah_Buddy_Keith remember:
Okaa-sama = Esteemed Mother
Imouto = Little sister

“All according to keikaku”
TN: Keikaku means plan