There is English support via the English interface and English subtitles.

This release does not seem to be Win7 compatible despite the official spec saying so on steam - there's the api-ms-win-core-path-l1-1-0.dll error, which if substituted results in an 0xc000007b error.
If you try running the index.html with allow local file access flag, then it complains that window.chrome.webview is undefined - some MS's Webview2 runtime issue which likely require the exe as glue. (Just installing the runtime won't work)

BUT I did managed to get the game to run:

In　www\scripts　,open　main.js
(the file has been condensed, use a js pretty print site for easy reading.)

At line 550,

IsWindowsWebView2() {
    return this._exportType === "windows-webview2" || !!(this._exportType === ...)
}

This is a function returning two values, joined by an OR (the || sign)
remove the first value and OR, so that it only returns the later:

IsWindowsWebView2() {
    return !!(this._exportType === ...)
}

Now launch the index.html with allow local file access flag, and it should run.
No guarantees that the game will run 100% perfect, but better than nothing.
(By experience, if a game can run this way, the most common problem is save/load not working. Thankfully key mapping still works in this game.)