diff --git a/packages/babel-core/package.json b/packages/babel-core/package.json
index 5831982641..9b68446565 100644
--- a/packages/babel-core/package.json
+++ b/packages/babel-core/package.json
@@ -28,7 +28,6 @@
     "babel-code-frame": "7.0.0-beta.2",
     "babel-generator": "7.0.0-beta.2",
     "babel-helpers": "7.0.0-beta.2",
-    "babel-messages": "7.0.0-beta.2",
     "babel-template": "7.0.0-beta.2",
     "babel-traverse": "7.0.0-beta.2",
     "babel-types": "7.0.0-beta.2",
diff --git a/packages/babel-core/src/config/option-manager.js b/packages/babel-core/src/config/option-manager.js
index 7c7289889d..41610ba722 100644
--- a/packages/babel-core/src/config/option-manager.js
+++ b/packages/babel-core/src/config/option-manager.js
@@ -2,7 +2,6 @@
 
 import * as context from "../index";
 import Plugin from "./plugin";
-import * as messages from "babel-messages";
 import defaults from "lodash/defaults";
 import merge from "lodash/merge";
 import removed from "./removed";
@@ -334,7 +333,7 @@ function instantiatePlugin({ value: pluginObj, descriptor }) {
   Object.keys(pluginObj).forEach(key => {
     if (!ALLOWED_PLUGIN_KEYS.has(key)) {
       throw new Error(
-        messages.get("pluginInvalidProperty", descriptor.alias, key),
+        `Plugin ${descriptor.alias} provided an invalid property of ${key}`,
       );
     }
   });
diff --git a/packages/babel-core/src/index.js b/packages/babel-core/src/index.js
index fe616d5260..998bbd835f 100644
--- a/packages/babel-core/src/index.js
+++ b/packages/babel-core/src/index.js
@@ -5,7 +5,6 @@ export { resolvePlugin, resolvePreset } from "./config/loading/files";
 export { version } from "../package";
 export { getEnv } from "./config/helpers/environment";
 
-export * as messages from "babel-messages";
 export * as types from "babel-types";
 export traverse from "babel-traverse";
 export template from "babel-template";
diff --git a/packages/babel-core/src/tools/build-external-helpers.js b/packages/babel-core/src/tools/build-external-helpers.js
index 79df23e379..4ab5358ef2 100644
--- a/packages/babel-core/src/tools/build-external-helpers.js
+++ b/packages/babel-core/src/tools/build-external-helpers.js
@@ -1,6 +1,5 @@
 import * as helpers from "babel-helpers";
 import generator from "babel-generator";
-import * as messages from "babel-messages";
 import template from "babel-template";
 import * as t from "babel-types";
 
@@ -178,7 +177,7 @@ export default function(
   if (build) {
     tree = build(namespace, builder);
   } else {
-    throw new Error(messages.get("unsupportedOutputType", outputType));
+    throw new Error(`Unsupported output type ${outputType}`);
   }
 
   return generator(tree).code;
diff --git a/packages/babel-generator/package.json b/packages/babel-generator/package.json
index ee86949534..1d55da8132 100644
--- a/packages/babel-generator/package.json
+++ b/packages/babel-generator/package.json
@@ -11,7 +11,6 @@
     "lib"
   ],
   "dependencies": {
-    "babel-messages": "7.0.0-beta.2",
     "babel-types": "7.0.0-beta.2",
     "jsesc": "^2.5.1",
     "lodash": "^4.2.0",
diff --git a/packages/babel-generator/src/index.js b/packages/babel-generator/src/index.js
index 62eced901a..265506f3ee 100644
--- a/packages/babel-generator/src/index.js
+++ b/packages/babel-generator/src/index.js
@@ -1,5 +1,4 @@
 import SourceMap from "./source-map";
-import * as messages from "babel-messages";
 import Printer, { type Format } from "./printer";
 
 /**
@@ -74,7 +73,8 @@ function normalizeOptions(code, opts): Format {
 
     if (format.compact) {
       console.error(
-        "[BABEL] " + messages.get("codeGeneratorDeopt", opts.filename, "500KB"),
+        "[BABEL] Note: The code generator has deoptimised the styling of " +
+          `${opts.filename} as it exceeds the max of ${"500KB"}.`,
       );
     }
   }
diff --git a/packages/babel-helper-replace-supers/package.json b/packages/babel-helper-replace-supers/package.json
index 520e10ca4a..fc0b43dce0 100644
--- a/packages/babel-helper-replace-supers/package.json
+++ b/packages/babel-helper-replace-supers/package.json
@@ -7,7 +7,6 @@
   "main": "lib/index.js",
   "dependencies": {
     "babel-helper-optimise-call-expression": "7.0.0-beta.2",
-    "babel-messages": "7.0.0-beta.2",
     "babel-template": "7.0.0-beta.2",
     "babel-traverse": "7.0.0-beta.2",
     "babel-types": "7.0.0-beta.2"
diff --git a/packages/babel-helper-replace-supers/src/index.js b/packages/babel-helper-replace-supers/src/index.js
index 139df00e4b..cb0fcecdee 100644
--- a/packages/babel-helper-replace-supers/src/index.js
+++ b/packages/babel-helper-replace-supers/src/index.js
@@ -1,6 +1,5 @@
 import type { NodePath, Scope } from "babel-traverse";
 import optimiseCall from "babel-helper-optimise-call-expression";
-import * as messages from "babel-messages";
 import * as t from "babel-types";
 
 // ✌️
@@ -251,7 +250,7 @@ export default class ReplaceSupers {
     const node = path.node;
 
     if (isIllegalBareSuper(node, parent)) {
-      throw path.buildCodeFrameError(messages.get("classesIllegalBareSuper"));
+      throw path.buildCodeFrameError("Illegal use of bare super");
     }
 
     if (t.isCallExpression(node)) {
diff --git a/packages/babel-messages/.npmignore b/packages/babel-messages/.npmignore
deleted file mode 100644
index f980694583..0000000000
--- a/packages/babel-messages/.npmignore
+++ /dev/null
@@ -1,3 +0,0 @@
-src
-test
-*.log
diff --git a/packages/babel-messages/README.md b/packages/babel-messages/README.md
deleted file mode 100644
index 98ecf8b2c0..0000000000
--- a/packages/babel-messages/README.md
+++ /dev/null
@@ -1,18 +0,0 @@
-# babel-messages
-
-> Collection of debug messages used by Babel.
-
-## Install
-
-```sh
-npm install --save-dev babel-messages
-```
-
-## Usage
-
-```js
-import * as messages from 'babel-messages';
-
-messages.get('tailCallReassignmentDeopt');
-// > "Function reference has been..."
-```
diff --git a/packages/babel-messages/package.json b/packages/babel-messages/package.json
deleted file mode 100644
index eb757bed6f..0000000000
--- a/packages/babel-messages/package.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-  "name": "babel-messages",
-  "version": "7.0.0-beta.2",
-  "description": "Collection of debug messages used by Babel.",
-  "author": "Sebastian McKenzie <sebmck@gmail.com>",
-  "homepage": "https://babeljs.io/",
-  "license": "MIT",
-  "repository": "https://github.com/babel/babel/tree/master/packages/babel-messages",
-  "main": "lib/index.js"
-}
diff --git a/packages/babel-messages/src/index.js b/packages/babel-messages/src/index.js
deleted file mode 100644
index 5870dc6d8e..0000000000
--- a/packages/babel-messages/src/index.js
+++ /dev/null
@@ -1,96 +0,0 @@
-/* eslint max-len: "off" */
-
-import * as util from "util";
-
-/**
- * Mapping of messages to be used in Babel.
- * Messages can include $0-style placeholders.
- */
-
-export const MESSAGES = {
-  tailCallReassignmentDeopt:
-    "Function reference has been reassigned, so it will probably be dereferenced, therefore we can't optimise this with confidence",
-  classesIllegalBareSuper: "Illegal use of bare super",
-  classesIllegalSuperCall:
-    "Direct super call is illegal in non-constructor, use super.$1() instead",
-  scopeDuplicateDeclaration: "Duplicate declaration $1",
-  settersNoRest: "Setters aren't allowed to have a rest",
-  noAssignmentsInForHead: "No assignments allowed in for-in/of head",
-  expectedMemberExpressionOrIdentifier:
-    "Expected type MemberExpression or Identifier",
-  invalidParentForThisNode:
-    "We don't know how to handle this node within the current parent - please open an issue",
-  readOnly: "$1 is read-only",
-  unknownForHead: "Unknown node type $1 in ForStatement",
-  didYouMean: "Did you mean $1?",
-  codeGeneratorDeopt:
-    "Note: The code generator has deoptimised the styling of $1 as it exceeds the max of $2.",
-  missingTemplatesDirectory:
-    "no templates directory - this is most likely the result of a broken `npm publish`. Please report to https://github.com/babel/babel/issues",
-  unsupportedOutputType: "Unsupported output type $1",
-  illegalMethodName: "Illegal method name $1",
-  lostTrackNodePath:
-    "We lost track of this node's position, likely because the AST was directly manipulated",
-
-  modulesIllegalExportName: "Illegal export $1",
-  modulesDuplicateDeclarations:
-    "Duplicate module declarations with the same source but in different scopes",
-
-  undeclaredVariable: "Reference to undeclared variable $1",
-  undeclaredVariableType:
-    "Referencing a type alias outside of a type annotation",
-  undeclaredVariableSuggestion:
-    "Reference to undeclared variable $1 - did you mean $2?",
-
-  traverseNeedsParent:
-    "You must pass a scope and parentPath unless traversing a Program/File. Instead of that you tried to traverse a $1 node without passing scope and parentPath.",
-  traverseVerifyRootFunction:
-    "You passed `traverse()` a function when it expected a visitor object, are you sure you didn't mean `{ enter: Function }`?",
-  traverseVerifyVisitorProperty:
-    "You passed `traverse()` a visitor object with the property $1 that has the invalid property $2",
-  traverseVerifyNodeType:
-    "You gave us a visitor for the node type $1 but it's not a valid type",
-
-  pluginNotObject:
-    "Plugin $2 specified in $1 was expected to return an object when invoked but returned $3",
-  pluginNotFunction:
-    "Plugin $2 specified in $1 was expected to return a function but returned $3",
-  pluginUnknown:
-    "Unknown plugin $1 specified in $2 at $3, attempted to resolve relative to $4",
-  pluginInvalidProperty: "Plugin $1 provided an invalid property of $2",
-};
-
-/**
- * Get a message with $0 placeholders replaced by arguments.
- */
-
-export function get(key: string, ...args: Array<any>): string {
-  const msg = MESSAGES[key];
-  if (!msg) throw new ReferenceError(`Unknown message ${JSON.stringify(key)}`);
-
-  // stringify args
-  args = parseArgs(args);
-
-  // replace $0 placeholders with args
-  return msg.replace(/\$(\d+)/g, function(str, i) {
-    return args[i - 1];
-  });
-}
-
-/**
- * Stingify arguments to be used inside messages.
- */
-
-export function parseArgs(args: Array<any>): Array<string> {
-  return args.map(function(val) {
-    if (val != null && val.inspect) {
-      return val.inspect();
-    } else {
-      try {
-        return JSON.stringify(val) || val + "";
-      } catch (e) {
-        return util.inspect(val);
-      }
-    }
-  });
-}
diff --git a/packages/babel-plugin-check-es2015-constants/src/index.js b/packages/babel-plugin-check-es2015-constants/src/index.js
index 0f36b12f0a..662612e0e5 100644
--- a/packages/babel-plugin-check-es2015-constants/src/index.js
+++ b/packages/babel-plugin-check-es2015-constants/src/index.js
@@ -1,4 +1,4 @@
-export default function({ messages, types: t }) {
+export default function({ types: t }) {
   /**
    * Helper function to run a statement before an expression by replacing it with a comma expression
    * and wrapping the statement in an IIFE as the first operand.
@@ -23,7 +23,7 @@ export default function({ messages, types: t }) {
           for (const violation of (binding.constantViolations: Array)) {
             const throwNode = t.throwStatement(
               t.newExpression(t.identifier("Error"), [
-                t.stringLiteral(messages.get("readOnly", name)),
+                t.stringLiteral(`"${name}" is read-only`),
               ]),
             );
 
diff --git a/packages/babel-plugin-transform-es2015-classes/package.json b/packages/babel-plugin-transform-es2015-classes/package.json
index d42065db00..012848e8f5 100644
--- a/packages/babel-plugin-transform-es2015-classes/package.json
+++ b/packages/babel-plugin-transform-es2015-classes/package.json
@@ -11,7 +11,6 @@
     "babel-helper-function-name": "7.0.0-beta.2",
     "babel-helper-optimise-call-expression": "7.0.0-beta.2",
     "babel-helper-replace-supers": "7.0.0-beta.2",
-    "babel-messages": "7.0.0-beta.2",
     "babel-template": "7.0.0-beta.2",
     "babel-traverse": "7.0.0-beta.2",
     "babel-types": "7.0.0-beta.2"
diff --git a/packages/babel-plugin-transform-es2015-for-of/src/index.js b/packages/babel-plugin-transform-es2015-for-of/src/index.js
index 8490d952d8..8f1d2cc8c5 100644
--- a/packages/babel-plugin-transform-es2015-for-of/src/index.js
+++ b/packages/babel-plugin-transform-es2015-for-of/src/index.js
@@ -1,4 +1,4 @@
-export default function({ messages, template, types: t }) {
+export default function({ template, types: t }) {
   const buildForOfArray = template(`
     for (var KEY = 0; KEY < ARR.length; KEY++) BODY;
   `);
@@ -169,7 +169,7 @@ export default function({ messages, template, types: t }) {
     } else {
       throw file.buildCodeFrameError(
         left,
-        messages.get("unknownForHead", left.type),
+        `Unknown node type ${left.type} in ForStatement`,
       );
     }
 
@@ -226,7 +226,7 @@ export default function({ messages, template, types: t }) {
     } else {
       throw file.buildCodeFrameError(
         left,
-        messages.get("unknownForHead", left.type),
+        `Unknown node type ${left.type} in ForStatement`,
       );
     }
 
diff --git a/packages/babel-traverse/package.json b/packages/babel-traverse/package.json
index f8e05eb0d8..ad55f1a8ac 100644
--- a/packages/babel-traverse/package.json
+++ b/packages/babel-traverse/package.json
@@ -10,7 +10,6 @@
   "dependencies": {
     "babel-code-frame": "7.0.0-beta.2",
     "babel-helper-function-name": "7.0.0-beta.2",
-    "babel-messages": "7.0.0-beta.2",
     "babel-types": "7.0.0-beta.2",
     "babylon": "7.0.0-beta.26",
     "debug": "^3.0.1",
diff --git a/packages/babel-traverse/src/index.js b/packages/babel-traverse/src/index.js
index 58cb925821..9feb4f0999 100644
--- a/packages/babel-traverse/src/index.js
+++ b/packages/babel-traverse/src/index.js
@@ -1,6 +1,5 @@
 import TraversalContext from "./context";
 import * as visitors from "./visitors";
-import * as messages from "babel-messages";
 import includes from "lodash/includes";
 import * as t from "babel-types";
 import * as cache from "./cache";
@@ -22,7 +21,11 @@ export default function traverse(
 
   if (!opts.noScope && !scope) {
     if (parent.type !== "Program" && parent.type !== "File") {
-      throw new Error(messages.get("traverseNeedsParent", parent.type));
+      throw new Error(
+        "You must pass a scope and parentPath unless traversing a Program/File. " +
+          `Instead of that you tried to traverse a ${parent.type} node without ` +
+          "passing scope and parentPath.",
+      );
     }
   }
 
diff --git a/packages/babel-traverse/src/scope/index.js b/packages/babel-traverse/src/scope/index.js
index 43dbc11b84..1ad96fdb9f 100644
--- a/packages/babel-traverse/src/scope/index.js
+++ b/packages/babel-traverse/src/scope/index.js
@@ -4,7 +4,6 @@ import Renamer from "./lib/renamer";
 import type NodePath from "../path";
 import traverse from "../index";
 import defaults from "lodash/defaults";
-import * as messages from "babel-messages";
 import Binding from "./binding";
 import globals from "globals";
 import * as t from "babel-types";
@@ -361,7 +360,7 @@ export default class Scope {
     if (duplicate) {
       throw this.hub.file.buildCodeFrameError(
         id,
-        messages.get("scopeDuplicateDeclaration", name),
+        `Duplicate declaration "${name}"`,
         TypeError,
       );
     }
diff --git a/packages/babel-traverse/src/visitors.js b/packages/babel-traverse/src/visitors.js
index e55662b6c4..84d57c3bfb 100644
--- a/packages/babel-traverse/src/visitors.js
+++ b/packages/babel-traverse/src/visitors.js
@@ -1,5 +1,4 @@
 import * as virtualTypes from "./path/lib/virtual-types";
-import * as messages from "babel-messages";
 import * as t from "babel-types";
 import clone from "lodash/clone";
 
@@ -125,7 +124,10 @@ export function verify(visitor) {
   if (visitor._verified) return;
 
   if (typeof visitor === "function") {
-    throw new Error(messages.get("traverseVerifyRootFunction"));
+    throw new Error(
+      "You passed `traverse()` a function when it expected a visitor object, " +
+        "are you sure you didn't mean `{ enter: Function }`?",
+    );
   }
 
   for (const nodeType in visitor) {
@@ -136,7 +138,9 @@ export function verify(visitor) {
     if (shouldIgnoreKey(nodeType)) continue;
 
     if (t.TYPES.indexOf(nodeType) < 0) {
-      throw new Error(messages.get("traverseVerifyNodeType", nodeType));
+      throw new Error(
+        `You gave us a visitor for the node type ${nodeType} but it's not a valid type`,
+      );
     }
 
     const visitors = visitor[nodeType];
@@ -150,7 +154,8 @@ export function verify(visitor) {
           );
         } else {
           throw new Error(
-            messages.get("traverseVerifyVisitorProperty", nodeType, visitorKey),
+            "You passed `traverse()` a visitor object with the property " +
+              `${nodeType} that has the invalid property ${visitorKey}`,
           );
         }
       }