add filter to show only courses in the currently selected language

config.rb

@@ -47,7 +47,7 @@ require 'ruby-cheerio'
 helpers do
   def get_invitation_only_courses
     courses = data.courses.clone
-    courses['results'] = data.courses['results'].select { |course| not course['hidden'] and course['invitation_only'] == true }
+    courses['results'] = data.courses['results'].select { |course| not course['hidden'] and course['invitation_only'] == true and filter_course_language(course['number'], locale) }
     courses
   end
 
@@ -55,7 +55,7 @@ helpers do
   # You can change this under Settings -> Advanced Settings in Studio.
   def get_enrollable_courses
     courses = data.courses.clone
-    courses['results'] = data.courses['results'].select { |course| course['invitation_only'] == false }
+    courses['results'] = data.courses['results'].select { |course| course['invitation_only'] == false and filter_course_language(course['number'], locale)}
     courses
   end
 
@@ -127,6 +127,13 @@ helpers do
     links
   end
 
+  # Our convention is to end course numbers with their language code in upper
+  # case, an example course number: "TP_DR_FA" for Totem Project Desk Research
+  # Farsi
+  def filter_course_language(course_number, loc)
+    loc = loc.to_s.upcase
+    course_number.end_with? "_#{loc}"
+  end
 end
 
 # Site settings

source/pages/index.html.erb

@@ -74,8 +74,13 @@ if courses["results"].any?
           )
         %>
       </div>
+      <div class="container text-center">
+      <a class="btn btn-xl" href="https://learn.totem-project.org/courses">
+        <!-- <span><%= t :find_more_courses%></span> -->
+        <span>Find more courses</span>
+      </a>
+      </div>
     </section>
-
 <%
 end # end `if courses["results"].any?` statement
 fallback_image = '/img/books.svg'