A helpful feature for regarding language changes would be a native "In-App Language Switcher" that eliminates the need for manual configuration file edits or external patches.
The most reliable way to get SAI 2 in English is to download it directly from the official English Development Room Manual Translation: Unlike Version 1, there is no language.conf paint tool sai change language
If your menus look like random symbols or question marks, it is usually a Windows Region/Locale issue rather than a SAI issue. Go to your Windows Time & Language A helpful feature for regarding language changes would