Even if everyone is using English, there will be cultural differences. I used to work at a company which had a lot of indian externals working on their code base. Whenever I had to work on a mainly Indian developed project i had to get used to how they wrote things. Usually things where named a bit different. Not by much, but enough tho throw me off a couple of times before i got used to it.
IMPORTANT: I am not shitting on how they used English, merely pointing out that they used it differently from how i would have expected.
I agree with you, that even the devil would run away from localised scripts.
Just pointing out that even if everyone is using English, there will be differences. These differences can make it hard enough - no need for more stuff on top.