swiftc ocr.swift -o ocr
./ocr [option]
Language can be specified in [option] with "en", "zh" (中文), "zh-Hans" (简体中文) or "zh-Hant" (繁体中文).
swift ocr.swift [option]
In the repository I forked from, a specified language is appended behind "en-US", which leads to an unexpected result.