How do you spell Laci in Japanese?

Answer 1

ラコーイ

"rakooi"

All foreign names in Japanese sound the same of course, but they are also most commonly spelled using their system of writing called katakana. Actual Japanese words are most commonly spelled using their other system of writing called hiragana.

"LaCoy" would look like this in hiragana:

らこい

Answer 2

Laci would be spelled like レィシー (reishii) in katakana.