Get Available Languages Programmatically for Current Site in Optimizely/Episerver CMS

using EPiServer;
using EPiServer.Core;
using EPiServer.DataAbstraction.Internal;
using EPiServer.ServiceLocation;
using EPiServer.Web;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;

namespace Foundation.Helpers
{
    public static class LanguageHelper
    {
        // Used to get the start page
        private static readonly Lazy<IContentLoader> _contentLoader = new Lazy<IContentLoader>(() => ServiceLocator.Current.GetInstance<IContentLoader>());

        /// <summary>
        /// Returns the list of site languages
        /// </summary>
        /// <returns></returns>
        public static IEnumerable<Language> GetSiteLanguages()
        {
            var site = SiteDefinition.Current; // Get current site
            var startPage = site.StartPage?.Get<PageData>(); // Usually start page has the configuration of the languages available for the current site
            var activeLanguages = ServiceLocator.Current.GetInstance<LanguageBranchRepository>().ListEnabled(); // Get all active languages in the CMS
            var siteLanguages = ((PageData)startPage)?.ExistingLanguages?.ToList(); // Get all existing languages for the current site / start page

            var lstLanguages = new List<Language>(); // A list of a poco class for languages
            foreach (var activeLanguage in activeLanguages) // Iterate over all the active languages in the CMS
            {
                var culture = new CultureInfo(activeLanguage.LanguageID); // Create a culture info variable for comparison
                var currentCulture = siteLanguages?.FirstOrDefault(x => x.Name == culture.Name); // Find in the list of existing languages for the current site one of the active ones 
                if (currentCulture != null) // If we found one, add it to the list using the native language name as label, plus the iso as value
                {
                    lstLanguages.Add(new Language()
                    {
                        Label = char.ToUpper(currentCulture.NativeName[0]) + currentCulture.NativeName.Substring(1),
                        Value = currentCulture.Name
                    });
                }
            }

            // Return the list of languages found
            return lstLanguages;
        }

        // Get a page data from the content reference
        public static IContent Get<TContent>(this ContentReference contentLink) where TContent : IContent => contentLink != null ? _contentLoader.Value.Get<TContent>(contentLink) : default;

        // POCO class to return to the view
        public class Language
        {
            public string Label { get; set; }

            public string Value { get; set; }
        }
    }
}

@{
                var currentLanguages = LanguageHelper.GetSiteLanguages();
            }
            <div class="account-form__field-wrapper">
                <label for="language" class="account-form__field-label">Language<span class="account-form__required-indicator">*</span></label>
                <div class="account-form__input-wrapper">
                    <div class="account-form__select-wrapper">
                        <select class="account-form__field"
                                name="language"
                                id="language"
                                required
                                data-pristine-required-message="Language required">
                            <option value="" data-placeholder="true">Choose your language</option>
                            @foreach (var currentLanguage in currentLanguages)
                            {
                                <option value="@currentLanguage.Value">@currentLanguage.Label</option>
                            }
                        </select>
                        <svg xmlns="http://www.w3.org/2000/svg" width="17" height="16" viewBox="0 0 17 16"> <g fill="none" fill-rule="evenodd"> <g fill="#6E6259" fill-rule="nonzero"> <g> <g> <g> <g> <path d="M2.97.029c.107 0 .213.04.295.12L5.819 2.67c.164.161.164.42 0 .582-.163.16-.426.16-.587 0L2.97 1.02.71 3.25c-.163.161-.426.161-.588 0-.163-.16-.163-.42 0-.58L2.677.147c.08-.079.187-.12.293-.12z" transform="translate(-628 -519) translate(380 482) translate(11.926 34) translate(236.148 3) matrix(1 0 0 -1 5 10)" /> </g> </g> </g> </g> </g> </g> </svg>
                    </div>
                    <svg class="account-form__input-error-icon" viewBox="0 0 14 14"><use xlink:href="#error" /></svg>
                </div>
            </div>