Localization support - PaulMiami/reCAPTCHA GitHub Wiki

#Localization support

You can localize the recaptcha control in two ways:

• By setting the language code when adding the "RecaptchaService":

    public void ConfigureServices(IServiceCollection services)
    {
        ...
        services.AddRecaptcha(new RecaptchaOptions
        {
            SiteKey = Configuration["Recaptcha:SiteKey"],
            SecretKey = Configuration["Recaptcha:SecretKey"],
            LanguageCode = "en-US"
        });
        ...
    }

• By using the aspnetcore localization middleware:

        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            ...
            var supportedCultures = new[]
            {
                  new CultureInfo("en-US"),
                  new CultureInfo("en-AU"),
                  new CultureInfo("en-GB"),
                  new CultureInfo("en"),
                  new CultureInfo("es-ES"),
                  new CultureInfo("es-MX"),
                  new CultureInfo("es"),
                  new CultureInfo("fr-FR"),
                  new CultureInfo("fr")
            };

            app.UseRequestLocalization(new RequestLocalizationOptions
            {
                DefaultRequestCulture = new RequestCulture("en-US"),
                // Formatting numbers, dates, etc.
                SupportedCultures = supportedCultures,
                // UI strings that we have localized.
                SupportedUICultures = supportedCultures
            });

            app.UseMvc(routes =>
            {
                ...
            });
        }

NOTE: Only the language codes (languagecode2-country/regioncode2 format) supported by google will work, but it does fallback if you provide a code that is not supported.