Add Language model and LanguageController

config/routes.rb

@@ -3,6 +3,7 @@ Rails.application.routes.draw do
   #get 'dictionary/index'
   resources :dictionary, only: [:index, :show]
   resources :words, only: [:index, :show]
+  resources :languages
   # Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html
 
   # Reveal health status on /up that returns 200 if the app boots with no exceptions, otherwise 500.