there are lot of other user that have no issue installing Fences in their system
You need to know, English is not the only language in the world that people use.
I use Chinese language in my OS, and I'll not change my language setting of my OS, because it works with games, and other software, and I also use English language with most of my installed software without problem.
You can solve this issue by let user choose installer language at the beginning of the installer. This won't solve the issue, but at least user has other option to avoid the issue.
Feel free to ignore it, as I said in another post, I already refund it, and I'm not going to use this software anytime soon due to terrible experience.