Languages.json file

In my opinion languages.json file should be something like this:
{
“en”: “English”,
“ar”: “العربية”,
“bg”: “Български”,
“fr”: “Français”,
“ja”: “日本語”,

}

And there is no need for other country languages-xx.json files ( or simply these files can be copy of languages.js)
This is preferred method of selecting languages, for example if one selects japanese language by mistake and changing back to other is very difficult unless you can read Japnese…