betaflight-configurator/js/localization.js

function localize() {
    var localized = 0;

    var translate = function(messageID) {
        localized++;

        return chrome.i18n.getMessage(messageID);
    };

    $('[i18n]:not(.i18n-replaced').each(function() {
        var element = $(this);

        element.html(translate(element.attr('i18n')));
        element.addClass('i18n-replaced');
    });

    $('[i18n_title]:not(.i18n_title-replaced').each(function() {
        var element = $(this);

        element.attr('title', translate(element.attr('i18n_title')));
        element.addClass('i18n_title-replaced');
    });

    $('[i18n_value]:not(.i18n_value-replaced').each(function() {
        var element = $(this);

        element.val(translate(element.attr('i18n_value')));
        element.addClass('i18n_value-replaced');
    });

    $('[i18n_placeholder]:not(.i18n_placeholder-replaced').each(function() {
        var element = $(this);

        element.attr('placeholder', translate(element.attr('i18n_placeholder')));
        element.addClass('i18n_placeholder-replaced');
    });

    return localized;
}