Netflix doesn't provide any keyboard shortcut to toggle English subtitle, so inject the following script to enable that feature. Keyboard Shortcut: Ctrl + S

inject_script_netflix_subtitle_keyboard_shortcut.js

document.addEventListener("keypress", (evt) => {
    if (evt.ctrlKey && evt.keyCode === 19) {
        console.log("Subtitle shortcut triggered");

        const btn = document.querySelector(".button-nfplayerSubtitles");
        if (!btn) {
            return;
        }
        
        const parent = btn.parentElement;
        if (!parent) {
            return;
        }

        btn.click();
        const allTracks = [...parent.querySelectorAll(".track-list-subtitles li.track")];

        const englishTrack = allTracks.find(track => track.textContent.toLowerCase().includes("english"));
        if (!englishTrack) {
            return;
        }

        const offTrack = allTracks.find(track => track.textContent.toLowerCase().includes("off"));
        if (!offTrack) {
            return;
        }

        if (englishTrack.getAttribute("class").includes("selected")) {
            offTrack.click();
        } else {
            englishTrack.click();
        }

        btn.click();
    }
});

This is so great!

It seems to be not working anymore.