diff --git a/modules/lang/python/doctor.el b/modules/lang/python/doctor.el
new file mode 100644
index 000000000..89aeb9e68
--- /dev/null
+++ b/modules/lang/python/doctor.el
@@ -0,0 +1,8 @@
+;;; lang/python/doctor.el -*- lexical-binding: t; -*-
+
+(unless (executable-find "python")
+  (warn! "Python isn't installed."))
+
+(when (executable-find "pyenv")
+  (unless (split-string (shell-command-to-string "pyenv versions --bare") "\n" t)
+    (warn! "No versions of python are available via pyenv, did you forget to install one?")))
diff --git a/modules/lang/ruby/doctor.el b/modules/lang/ruby/doctor.el
new file mode 100644
index 000000000..7050b4f28
--- /dev/null
+++ b/modules/lang/ruby/doctor.el
@@ -0,0 +1,8 @@
+;;; lang/ruby/doctor.el -*- lexical-binding: t; -*-
+
+(unless (executable-find "ruby")
+  (warn! "Ruby isn't installed."))
+
+(when (executable-find "rbenv")
+  (unless (split-string (shell-command-to-string "rbenv versions --bare") "\n" t)
+    (warn! "No versions of ruby are available via rbenv, did you forget to install one?")))