Can I replace localisation files with the Essential Editor?

For Korean, which has a lot of terrible localisation issues, I’ve been sending a lot of reports and getting tired of devs not being receptive at all, so I’ve been looking into making my own. Then I discovered the Essential Editor and saw that you can view SGAs, so I found the localisation files and fixed them, but repackaging them back into SGAs seems to be unstable - the game doesn’t recognise the modified files when running, so is there any other way?