Hello.
This version doesn't work with Drupal ^8.8
I use Drupal 8.9.3 and after updating this module to latest (8.x-1.0-beta12) version I have got this error:
TypeError: Argument 1 passed to Drupal\\disable_language\\EventSubscriber\\DisabledLanguagesEventSubscriber::checkForDisabledLanguageAndRedirect() must be an instance of Symfony\\Component\\HttpKernel\\Event\\RequestEvent, instance of Symfony\\Component\\HttpKernel\\Event\\GetResponseEvent given in /_PATH_/modules/disable_language/src/EventSubscriber/DisabledLanguagesEventSubscriber.php on line 97 #0 [internal function]: Drupal\\disable_language\\EventSubscriber\\DisabledLanguagesEventSubscriber->checkForDisabledLanguageAndRedirect(Object(Symfony\\Component\\HttpKernel\\Event\\GetResponseEvent), 'kernel.request', Object(Drupal\\Component\\EventDispatcher\\ContainerAwareEventDispatcher))\n#1 /_PATH_/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php(111): call_user_func(Array, Object(Symfony\\Component\\HttpKernel\\Event\\GetResponseEvent), 'kernel.request', Object(Drupal\\Component\\EventDispatcher\\ContainerAwareEventDispatcher))\n#2 /_PATH_/vendor/symfony/http-kernel/HttpKernel.php(127): Drupal\\Component\\EventDispatcher\\ContainerAwareEventDispatcher->dispatch('kernel.request', Object(Symfony\\Component\\HttpKernel\\Event\\GetResponseEvent))\n#3 /_PATH_/vendor/symfony/http-kernel/HttpKernel.php(68): Symfony\\Component\\HttpKernel\\HttpKernel->handleRaw(Object(Symfony\\Component\\HttpFoundation\\Request), 1)\n#4 /_PATH_/core/lib/Drupal/Core/StackMiddleware/Session.php(57): Symfony\\Component\\HttpKernel\\HttpKernel->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#5 /_PATH_/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(47): Drupal\\Core\\StackMiddleware\\Session->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#6 /_PATH_/core/modules/page_cache/src/StackMiddleware/PageCache.php(191): Drupal\\Core\\StackMiddleware\\KernelPreHandle->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#7 /_PATH_/core/modules/page_cache/src/StackMiddleware/PageCache.php(128): Drupal\\page_cache\\StackMiddleware\\PageCache->fetch(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#8 /_PATH_/core/modules/page_cache/src/StackMiddleware/PageCache.php(82): Drupal\\page_cache\\StackMiddleware\\PageCache->lookup(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#9 /_PATH_/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(47): Drupal\\page_cache\\StackMiddleware\\PageCache->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#10 /_PATH_/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(52): Drupal\\Core\\StackMiddleware\\ReverseProxyMiddleware->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#11 /_PATH_/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\\Core\\StackMiddleware\\NegotiationMiddleware->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#12 /_PATH_/core/lib/Drupal/Core/DrupalKernel.php(708): Stack\\StackedHttpKernel->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)\n#13 /_PATH_/index.php(19): Drupal\\Core\\DrupalKernel->handle(Object(Symfony\\Component\\HttpFoundation\\Request))\n#14 {main}