diff --git a/lib/coursemology/polyglot/language.rb b/lib/coursemology/polyglot/language.rb
index 51a3aa9..8c1486b 100644
--- a/lib/coursemology/polyglot/language.rb
+++ b/lib/coursemology/polyglot/language.rb
@@ -30,6 +30,10 @@ class Coursemology::Polyglot::Language
     autoload :CPlusPlus
     autoload :Java
     autoload :R
+    autoload :CSharp
+    autoload :TypeScript
+    autoload :Go
+    autoload :Rust
   end
 
   # Marks the current class as a concrete language.
diff --git a/lib/coursemology/polyglot/language/c_sharp.rb b/lib/coursemology/polyglot/language/c_sharp.rb
new file mode 100644
index 0000000..ab81626
--- /dev/null
+++ b/lib/coursemology/polyglot/language/c_sharp.rb
@@ -0,0 +1,7 @@
+class Coursemology::Polyglot::Language::CSharp < Coursemology::Polyglot::Language
+  syntax_highlighter 'csharp', ace: 'csharp'
+
+  class CSharp5Point0 < Coursemology::Polyglot::Language::CSharp
+    concrete_language 'C# 5.0', docker_image: nil
+  end
+end
diff --git a/lib/coursemology/polyglot/language/go.rb b/lib/coursemology/polyglot/language/go.rb
new file mode 100644
index 0000000..504c99f
--- /dev/null
+++ b/lib/coursemology/polyglot/language/go.rb
@@ -0,0 +1,7 @@
+class Coursemology::Polyglot::Language::Go < Coursemology::Polyglot::Language
+  syntax_highlighter 'golang', ace: 'golang'
+
+  class Go1Point16 < Coursemology::Polyglot::Language::Go
+    concrete_language 'Go 1.16.2', docker_image: nil
+  end
+end
diff --git a/lib/coursemology/polyglot/language/java_script.rb b/lib/coursemology/polyglot/language/java_script.rb
index ea6845b..fdcc3cc 100644
--- a/lib/coursemology/polyglot/language/java_script.rb
+++ b/lib/coursemology/polyglot/language/java_script.rb
@@ -1,4 +1,10 @@
 class Coursemology::Polyglot::Language::JavaScript < Coursemology::Polyglot::Language
-  syntax_highlighter 'javascript'
+  # This is the old 'JavaScript' programming language before proper version specifiers were added.
+  # It should not be removed before all associated submissions are migrated to the versioned languages.
+  syntax_highlighter 'javascript', ace: 'javascript'
   concrete_language 'JavaScript', docker_image: 'javascript'
+
+  class JavaScript22 < Coursemology::Polyglot::Language::JavaScript
+    concrete_language 'JavaScript 22.16.0', docker_image: nil
+  end
 end
diff --git a/lib/coursemology/polyglot/language/rust.rb b/lib/coursemology/polyglot/language/rust.rb
new file mode 100644
index 0000000..972e94c
--- /dev/null
+++ b/lib/coursemology/polyglot/language/rust.rb
@@ -0,0 +1,7 @@
+class Coursemology::Polyglot::Language::Rust < Coursemology::Polyglot::Language
+  syntax_highlighter 'rust', ace: 'rust'
+
+  class Rust1Point68 < Coursemology::Polyglot::Language::Rust
+    concrete_language 'Rust 1.68.2', docker_image: nil
+  end
+end
diff --git a/lib/coursemology/polyglot/language/type_script.rb b/lib/coursemology/polyglot/language/type_script.rb
new file mode 100644
index 0000000..d384b91
--- /dev/null
+++ b/lib/coursemology/polyglot/language/type_script.rb
@@ -0,0 +1,7 @@
+class Coursemology::Polyglot::Language::TypeScript < Coursemology::Polyglot::Language
+  syntax_highlighter 'typescript', ace: 'typescript'
+
+  class TypeScript5Point8 < Coursemology::Polyglot::Language::TypeScript
+    concrete_language 'TypeScript 5.8.3', docker_image: nil
+  end
+end
diff --git a/lib/coursemology/polyglot/version.rb b/lib/coursemology/polyglot/version.rb
index ce59857..cd3050a 100644
--- a/lib/coursemology/polyglot/version.rb
+++ b/lib/coursemology/polyglot/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 module Coursemology; end
 module Coursemology::Polyglot
-  VERSION = '0.4.1'.freeze
+  VERSION = '0.4.2'.freeze
 end
diff --git a/spec/coursemology/polyglot/language/c_sharp_spec.rb b/spec/coursemology/polyglot/language/c_sharp_spec.rb
new file mode 100644
index 0000000..cd1c912
--- /dev/null
+++ b/spec/coursemology/polyglot/language/c_sharp_spec.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+require 'spec_helper'
+
+RSpec.describe Coursemology::Polyglot::Language::CSharp do
+  describe Coursemology::Polyglot::Language::CSharp::CSharp5Point0 do
+    it 'returns the correct display name' do
+      expect(subject.class.display_name).to eq('C# 5.0')
+    end
+
+    it 'returns a nil docker image' do
+      expect(subject.class.docker_image).to be_nil
+    end
+  end
+end
diff --git a/spec/coursemology/polyglot/language/go_spec.rb b/spec/coursemology/polyglot/language/go_spec.rb
new file mode 100644
index 0000000..09419d7
--- /dev/null
+++ b/spec/coursemology/polyglot/language/go_spec.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+require 'spec_helper'
+
+RSpec.describe Coursemology::Polyglot::Language::Go do
+  describe Coursemology::Polyglot::Language::Go::Go1Point16 do
+    it 'returns the correct display name' do
+      expect(subject.class.display_name).to eq('Go 1.16.2')
+    end
+
+    it 'returns a nil docker image' do
+      expect(subject.class.docker_image).to be_nil
+    end
+  end
+end
diff --git a/spec/coursemology/polyglot/language/java_script_spec.rb b/spec/coursemology/polyglot/language/java_script_spec.rb
new file mode 100644
index 0000000..25ac72e
--- /dev/null
+++ b/spec/coursemology/polyglot/language/java_script_spec.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+require 'spec_helper'
+
+RSpec.describe Coursemology::Polyglot::Language::JavaScript do
+  describe Coursemology::Polyglot::Language::JavaScript::JavaScript22 do
+    it 'returns the correct display name' do
+      expect(subject.class.display_name).to eq('JavaScript 22.16.0')
+    end
+
+    it 'returns a nil docker image' do
+      expect(subject.class.docker_image).to be_nil
+    end
+  end
+end
diff --git a/spec/coursemology/polyglot/language/rust_spec.rb b/spec/coursemology/polyglot/language/rust_spec.rb
new file mode 100644
index 0000000..d1805d8
--- /dev/null
+++ b/spec/coursemology/polyglot/language/rust_spec.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+require 'spec_helper'
+
+RSpec.describe Coursemology::Polyglot::Language::Rust do
+  describe Coursemology::Polyglot::Language::Rust::Rust1Point68 do
+    it 'returns the correct display name' do
+      expect(subject.class.display_name).to eq('Rust 1.68.2')
+    end
+
+    it 'returns a nil docker image' do
+      expect(subject.class.docker_image).to be_nil
+    end
+  end
+end
diff --git a/spec/coursemology/polyglot/language/type_script_spec.rb b/spec/coursemology/polyglot/language/type_script_spec.rb
new file mode 100644
index 0000000..6bc4c4e
--- /dev/null
+++ b/spec/coursemology/polyglot/language/type_script_spec.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+require 'spec_helper'
+
+RSpec.describe Coursemology::Polyglot::Language::TypeScript do
+  describe Coursemology::Polyglot::Language::TypeScript::TypeScript5Point8 do
+    it 'returns the correct display name' do
+      expect(subject.class.display_name).to eq('TypeScript 5.8.3')
+    end
+
+    it 'returns a nil docker image' do
+      expect(subject.class.docker_image).to be_nil
+    end
+  end
+end