No they won't change it. I highly doubt it. No worries there.
DMM and Nutaku do not like each other anymore. To my knowledge Nutaku won't bring any new DMM game to the english market cause they prefer games with western art style now. DMM didn't like how Nutaku mistreated some of their games. "Cough" Aigis "Cough" "Cough" Senpro "Cough"
Therefore no mobile version on the english site = No digit changes for FGs.
And like you said wouldn't make sense for Nutaku to change the digits since most of their customers are western people.
Edit:
Nice new Whaleship Record for me. Not as good as Allocer of course but still really good.
Rainbow Rose did 400K damage by herself. Sadly she didn't attack twice...otherwise my damage would have exceeded 1mil.