Electron locales, showing that electron does not allow "eo" through to the app.

console

[electron-app-shell-env] savanni@garnet:~/s/electron-app $ locale
LANG=eo.UTF-8
LC_CTYPE="eo.UTF-8"
LC_NUMERIC="eo.UTF-8"
LC_TIME="eo.UTF-8"
LC_COLLATE="eo.UTF-8"
LC_MONETARY="eo.UTF-8"
LC_MESSAGES="eo.UTF-8"
LC_PAPER="eo.UTF-8"
LC_NAME="eo.UTF-8"
LC_ADDRESS="eo.UTF-8"
LC_TELEPHONE="eo.UTF-8"
LC_MEASUREMENT="eo.UTF-8"
LC_IDENTIFICATION="eo.UTF-8"
LC_ALL=eo.UTF-8
[electron-app-shell-env] savanni@garnet:~/s/electron-app $ npm start

> electron-app@1.0.0 start /home/savanni/src/electron-app
> electron .

LOCALE:  en-US
[electron-app-shell-env] savanni@garnet:~/s/electron-app $ export LANG=de-DE
[electron-app-shell-env] savanni@garnet:~/s/electron-app $ export LC_ALL=de_DE
[electron-app-shell-env] savanni@garnet:~/s/electron-app $ locale   
LANG=de-DE
LC_CTYPE="de_DE"
LC_NUMERIC="de_DE"
LC_TIME="de_DE"
LC_COLLATE="de_DE"
LC_MONETARY="de_DE"
LC_MESSAGES="de_DE"
LC_PAPER="de_DE"
LC_NAME="de_DE"
LC_ADDRESS="de_DE"
LC_TELEPHONE="de_DE"
LC_MEASUREMENT="de_DE"
LC_IDENTIFICATION="de_DE"
LC_ALL=de_DE
[electron-app-shell-env] savanni@garnet:~/s/electron-app $ npm start

> electron-app@1.0.0 start /home/savanni/src/electron-app
> electron .

LOCALE:  de
[electron-app-shell-env] savanni@garnet:~/s/electron-app $ 

main.js

const { app } = require('electron')

app.whenReady().then(() => {
    console.log('LOCALE: ', app.getLocale())
    app.quit()
})

package.json

{
  "name": "electron-app",
  "version": "1.0.0",
  "description": "",
  "main": "main.js",
  "scripts": {
    "start": "electron ."
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "electron": "^12.0.0"
  }
}