Create a list of countries and languages spoken from the "List of official languages by state" page on Wikipedia https://en.wikipedia.org/wiki/List_of_official_languages_by_state

makelanguagelist.js

var countries = [];

// These states have no official languages, so override them with these ones.
var override = {
    "United Kingdom": ['English'],
    "United States": ['English'],
    "Australia": ['English'],
    "Mexico": ['Spanish'],
    "Chile": ['Spanish'],
}

    function sanitiseName(name) {
        return $.trim(name.match(/([^\(\[]*)/)[0]);
    }

$('#mw-content-text > ul > li').each(function() {
    var country = sanitiseName($('b:eq(0)', this).text());
    var languages = [];
    if (override[country]) {
        languages = override[country];
    } else {
        $(this).find('>ul>li').each(function() {
            languages.push(sanitiseName($(this).text()));
        });
    }
    countries.push({
        country: country,
        languages: languages
    });
});
console.log(JSON.stringify(countries));