Working with multi-lingual manifest files

basic-manifest.json

{
  "lang": "en-US",
  "name": "Aaron Gustafson",
  "short_name": "AaronG",
  "scope": "/",
  "display": "minimal-ui",
  "start_url": "/",
  "theme_color": "#27831B",
  "description": "The online home and work of Aaron Gustafson.",
  "orientation": "any",
  "background_color": "#fffcf4",
  "icons": [
    {
      "src": "/i/og-logo.webp",
      "type": "image/webp",
      "sizes": "800x600"
    },
    {
      "src": "/i/og-logo.png",
      "type": "image/png",
      "sizes": "800x600"
    },
    {
      "src": "/i/notification-icon.webp",
      "type": "image/webp",
      "sizes": "256x256"
    },
    {
      "src": "/i/notification-icon.png",
      "type": "image/png",
      "sizes": "256x256"
    },
    {
      "src": "/favicon.png",
      "type": "image/png",
      "sizes": "16x16"
    }
  ]
}

multiple-languages.html

<link rel="manifest" hreflang="en" href="/manifest.en.json">
<link rel="manifest" hreflang="es" href="/manifest.es.json">