It's pointless if the publisher doesn't do english translations of other series. From a business perspective, they'd never say yes just for one series. If anything, they'll fouble down on DMCAs. On top of that, you'll need several thousand signitures for the petition to be taken seriously, & that's if they don't outright ignore it for not being written in Korean.
On the contrary, it's worked before with a Comica series. That petition was also in English and had no where near a thousand signatures :)
https://petitions.moveon.org/sign/comica-please-publish?source=c.em.c&r_by=18796806
We have 116 people, but we need more please help!!!