diff --git a/Makefile.am b/Makefile.am
index 1cb5027..7987881 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -75,7 +75,8 @@ SOURCES =                                       \
   gash/readline.scm                             \
   gash/repl.scm                                 \
   gash/shell.scm                                \
-  gash/word.scm
+  gash/word.scm                                 \
+  language/sh/spec.scm
 
 bin_SCRIPTS =                                   \
   scripts/gash
diff --git a/doc/gash.texi b/doc/gash.texi
index 3ff62db..eedaa1c 100644
--- a/doc/gash.texi
+++ b/doc/gash.texi
@@ -247,6 +247,22 @@ Print each command that is executed.
 @end table
 
 
+@node Using Gash from the Guile REPL
+@section Using Gash from the Guile REPL
+
+Gash defines a language specification that extends Guile, allowing you
+to use shell syntax from the REPL.  This is accomplished by using the
+@code{language} REPL command:
+
+@example
+scheme@atchar{}(guile-user)> ,language sh
+Happy hacking with Guile as Shell!  To switch back, type `,L scheme'.
+sh@atchar{}(guile-user)> echo "Hello Gash!"
+Hello Gash!
+$1 = 0
+@end example
+
+
 @node Missing features
 @section Missing features
 
diff --git a/language/sh/spec.scm b/language/sh/spec.scm
new file mode 100644
index 0000000..894e368
--- /dev/null
+++ b/language/sh/spec.scm
@@ -0,0 +1,38 @@
+;;; Gash --- Guile As SHell
+;;; Copyright © 2020 Stephen J. Scheck <sscheck@singularsyntax.one>
+;;;
+;;; This file is part of Gash.
+;;;
+;;; Gash is free software: you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation, either version 3 of the License, or
+;;; (at your option) any later version.
+;;;
+;;; Gash is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with Gash.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (language sh spec)
+  #:use-module (gash environment)
+  #:use-module (gash eval)
+  #:use-module (gash parser)
+  #:use-module (system base language)
+  #:export (sh))
+
+;;; Commentary:
+;;;
+;;; This module contains the language spec definition that extends
+;;; Guile allowing use of shell syntax from the REPL by invocation
+;;; of the ,language meta-command.
+;;;
+;;; Code:
+
+(define-language sh
+  #:title "Guile as Shell"
+  #:reader (lambda (port env) (read-sh port))
+  #:evaluator (lambda (x module) (eval-sh x) (get-status))
+  #:printer write)