diff --git a/backend/src/api.ts b/backend/src/api.ts
index 4872cdf..8188d63 100644
--- a/backend/src/api.ts
+++ b/backend/src/api.ts
@@ -1,6 +1,7 @@
 "use strict";
 
 import * as fs from "fs";
+import * as mkdirp from "mkdirp";
 import * as pty from "node-pty";
 import { IPty } from "node-pty";
 import * as path from "path";
@@ -104,6 +105,9 @@ export class Session {
       if (suffix) {
         code += suffix;
       }
+      if (main.includes("/")) {
+        await mkdirp(path.dirname(path.resolve(tmpdir, main)));
+      }
       await new Promise((resolve, reject) =>
         fs.writeFile(path.resolve(tmpdir, main), code, (err) => {
           if (err) {
diff --git a/backend/src/langs.ts b/backend/src/langs.ts
index 4061f60..bd5d926 100644
--- a/backend/src/langs.ts
+++ b/backend/src/langs.ts
@@ -156,6 +156,15 @@ require("/usr/lib/node_modules/coffeescript/repl").start()
     main: "main.exs",
     run: "iex main.exs",
     template: `IO.puts("Hello, world!")
+`,
+  },
+  elvish: {
+    name: "Elvish",
+    monacoLang: "plaintext",
+    repl: "SHELL=/usr/bin/elvish HOME=. elvish",
+    main: ".elvish/rc.elv",
+    run: "SHELL=/usr/bin/elvish HOME=. elvish",
+    template: `echo "Hello, world!"
 `,
   },
   emacs: {
@@ -186,7 +195,7 @@ main() ->
     monacoLang: "plaintext",
     repl: "SHELL=/usr/bin/fish fish",
     main: "main.fish",
-    run: 'fish -C "$(< main.fish)"',
+    run: 'SHELL=/usr/bin/fish fish -C "$(< main.fish)"',
     template: `echo "Hello, world!"
 `,
   },
@@ -197,6 +206,17 @@ main() ->
     main: "main.fs",
     run: "gforth main.fs",
     template: `." Hello, world!" CR
+`,
+  },
+  fortran: {
+    name: "FORTRAN",
+    monacoLang: "plaintext",
+    main: "main.f",
+    compile: "flang main.f -o main",
+    run: "./main",
+    template: `       program hello
+          print *, "Hello, world!"
+       end program hello
 `,
   },
   fsharp: {
@@ -265,6 +285,15 @@ main = putStrLn "Hello, world!"
     main: "main.kts",
     run: "kotlinc -script main.kts; kotlinc",
     template: `println("Hello, world!")
+`,
+  },
+  ksh: {
+    name: "Ksh",
+    monacoLang: "shell",
+    repl: "SHELL=/usr/bin/ksh HOME=. ksh",
+    main: ".kshrc",
+    run: "SHELL=/usr/bin/ksh HOME=. ksh",
+    template: `echo "Hello, world!"
 `,
   },
   lolcode: {
@@ -305,6 +334,32 @@ eval.apply(this, [require("fs").readFileSync("main.js", {encoding: "utf-8"})])
 require("repl").start()
 '`,
     template: `console.log("Hello, world!")
+`,
+  },
+  objectivec: {
+    name: "Objective-C",
+    monacoLang: "objective-c",
+    main: "main.m",
+    compile:
+      "gcc $(gnustep-config --objc-flags) main.m $(gnustep-config --base-libs) -o main",
+    run: "./main",
+    template: `#import <Foundation/Foundation.h>
+
+int main() {
+  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+  NSLog(@"Hello, world!");
+  [pool drain];
+  return 0;
+}
+`,
+  },
+  perl: {
+    name: "Perl",
+    monacoLang: "perl",
+    repl: "re.pl",
+    main: "main.pl",
+    run: "re.pl --rcfile ./main.pl",
+    template: `print("Hello, world!\\n")
 `,
   },
   php: {
@@ -316,6 +371,15 @@ require("repl").start()
     template: `<?php
 
 echo "Hello, world!\\n";
+`,
+  },
+  powershell: {
+    name: "PowerShell",
+    monacoLang: "powershell",
+    repl: "SHELL=/usr/bin/pwsh pwsh",
+    main: "main.ps1",
+    run: "SHELL=/usr/bin/pwsh pwsh -NoExit main.ps1",
+    template: `Write-Host "Hello, world!"
 `,
   },
   python: {
@@ -370,6 +434,15 @@ binding_irb.run(IRB.conf)
     template: `fn main() {
     println!("Hello, world!");
 }
+`,
+  },
+  scala: {
+    name: "Scala",
+    monacoLang: "plaintext",
+    repl: "scala",
+    main: "main.scala",
+    run: "scala -i main.scala",
+    template: `println("Hello, world!")
 `,
   },
   scheme: {
@@ -381,6 +454,15 @@ binding_irb.run(IRB.conf)
     template: `(begin
   (display "Hello, world!")
   (newline))
+`,
+  },
+  sh: {
+    name: "Sh",
+    monacoLang: "shell",
+    repl: "SHELL=/usr/bin/sh HOME=. posh -l",
+    main: ".profile",
+    run: "SHELL=/usr/bin/sh HOME=. posh -l",
+    template: `echo "Hello, world!"
 `,
   },
   sqlite: {
@@ -399,6 +481,24 @@ binding_irb.run(IRB.conf)
     compile: "swiftc main.swift",
     run: "./main",
     template: `print("Hello, world!")
+`,
+  },
+  tcl: {
+    name: "Tcl",
+    monacoLang: "tcl",
+    repl: "tclsh",
+    main: ".tclshrc",
+    run: "HOME=. tclsh",
+    template: `puts {Hello, world!}
+`,
+  },
+  tcsh: {
+    name: "Tcsh",
+    monacoLang: "shell",
+    repl: "SHELL=/usr/bin/tcsh HOME=. tcsh",
+    main: ".tcshrc",
+    run: "SHELL=/usr/bin/tcsh HOME=. tcsh",
+    template: `echo "Hello, world!"
 `,
   },
   typescript: {
@@ -432,7 +532,7 @@ binding_irb.run(IRB.conf)
     monacoLang: "shell",
     repl: "SHELL=/usr/bin/zsh zsh",
     main: ".zshrc",
-    run: "ZDOTDIR=. zsh",
+    run: "SHELL=/usr/bin/zsh ZDOTDIR=. zsh",
     template: `echo "Hello, world!"
 `,
   },
diff --git a/package.json b/package.json
index 44516e6..6999c00 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,7 @@
     "express-ws": "^4.0.0",
     "file-loader": "^6.0.0",
     "heroku-ssl-redirect": "^0.0.4",
+    "mkdirp": "^1.0.4",
     "monaco-editor": "^0.20.0",
     "node-pty": "^0.9.0",
     "style-loader": "^1.2.1",
diff --git a/scripts/docker-install.bash b/scripts/docker-install.bash
index 9087e1c..e6a8b4e 100755
--- a/scripts/docker-install.bash
+++ b/scripts/docker-install.bash
@@ -86,6 +86,9 @@ dart
 # Elixir
 elixir
 
+# Elvish
+elvish
+
 # Emacs Lisp
 emacs-nox
 
@@ -98,6 +101,9 @@ fsharp
 # Fish
 fish
 
+# FORTRAN
+flang-7
+
 # Forth
 gforth
 
@@ -114,6 +120,9 @@ default-jdk
 # Julia
 julia
 
+# Ksh
+ksh
+
 # LOLCODE
 cmake
 
@@ -127,6 +136,14 @@ nim
 nodejs
 yarn
 
+# Objective-C
+gcc
+gnustep-devel
+
+# Perl
+perl
+perlconsole
+
 # PHP
 php
 
@@ -144,15 +161,27 @@ ruby
 # Rust
 rustc
 
+# Scala
+scala
+
 # Scheme
 mit-scheme
 
+# Sh
+posh
+
 # SQLite
 sqlite
 
 # Swift
 libpython2.7
 
+# Tcl
+tcl
+
+# Tcsh
+tcsh
+
 # Unlambda
 unlambda
 
@@ -178,6 +207,9 @@ npm install -g ts-node typescript
 # ReasonML
 npm install -g bs-platform
 
+# Perl
+cpan Devel::REPL
+
 # Needed for project infrastructure
 cd /tmp
 wget -nv https://github.com/watchexec/watchexec/releases/download/1.13.1/watchexec-1.13.1-x86_64-unknown-linux-gnu.deb
@@ -192,6 +224,13 @@ cp kotlinc/bin/* /usr/bin/
 cp kotlinc/lib/* /usr/lib/
 rm -rf kotlin-*.zip kotlinc
 
+# PowerShell
+cd /tmp
+wget -nv https://github.com/PowerShell/PowerShell/releases/download/v7.0.1/powershell-7.0.1-linux-x64.tar.gz
+mkdir /opt/powershell
+tar -xf powershell-*.tar.gz -C /opt/powershell
+ln -s /opt/powershell/pwsh /usr/bin/pwsh
+
 # Swift
 cd /tmp
 wget -nv https://swift.org/builds/swift-5.2.4-release/ubuntu2004/swift-5.2.4-RELEASE/swift-5.2.4-RELEASE-ubuntu20.04.tar.gz
@@ -231,6 +270,8 @@ while True:
     except EOFError:
         print("^D")
         break
+    if not code:
+        continue
     with tempfile.NamedTemporaryFile(mode="w") as f:
         f.write(code)
         f.flush()
@@ -261,6 +302,8 @@ while True:
     except EOFError:
         print("^D")
         break
+    if not code:
+        continue
     subprocess.run(["unlambda"], input=code, encoding="utf-8")
 EOF
 chmod +x /usr/bin/unlambda-repl
diff --git a/yarn.lock b/yarn.lock
index 1759012..ecb6c2b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2080,6 +2080,11 @@ mkdirp@^0.5.1, mkdirp@^0.5.3:
   dependencies:
     minimist "^1.2.5"
 
+mkdirp@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-1.0.4.tgz#3eb5ed62622756d79a5f0e2a221dfebad75c2f7e"
+  integrity sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw==
+
 monaco-editor@^0.20.0:
   version "0.20.0"
   resolved "https://registry.yarnpkg.com/monaco-editor/-/monaco-editor-0.20.0.tgz#5d5009343a550124426cb4d965a4d27a348b4dea"