It would be super-sweet of GOG if they could implement this feature: put a note next to the updated file, to inform us of what's new.
Are you sure? I only see an English installer. It even says so: "Windows installer, English 2.0.0 49 MB"
When I first entered the page it even oddlier showed the English installer flagged as new, but with the name "Windows installer, Spanish". I then selected another language (spanish) and it showed the spanish installer, flagged as new. Then switched back to english, it showed "Windows installer, English", not flagged. Switched to other languages, spanish, german and french flagged as new, english is not.
What a mess.