diff --git a/packages/babel-parser/src/tokenizer/types.ts b/packages/babel-parser/src/tokenizer/types.ts
index 1bf21dd323da..3b06b0c90be5 100644
--- a/packages/babel-parser/src/tokenizer/types.ts
+++ b/packages/babel-parser/src/tokenizer/types.ts
@@ -328,6 +328,9 @@ export const tt = {
   _opaque: createKeywordLike("opaque", { startsExpr }),
   // end: isFlowInterfaceOrTypeOrOpaque
   name: createToken("name", { startsExpr }),
+
+  // placeholder plugin
+  placeholder: createToken("%%", { startsExpr: true }),
   // end: isIdentifier
 
   string: createToken("string", { startsExpr }),
@@ -345,13 +348,10 @@ export const tt = {
   jsxText: createToken("jsxText", { beforeExpr: true }),
   jsxTagStart: createToken("jsxTagStart", { startsExpr: true }),
   jsxTagEnd: createToken("jsxTagEnd"),
-
-  // placeholder plugin
-  placeholder: createToken("%%", { startsExpr: true }),
 } as const;
 
 export function tokenIsIdentifier(token: TokenType): boolean {
-  return token >= tt._as && token <= tt.name;
+  return token >= tt._as && token <= tt.placeholder;
 }
 
 export function tokenKeywordOrIdentifierIsKeyword(token: TokenType): boolean {
@@ -361,7 +361,7 @@ export function tokenKeywordOrIdentifierIsKeyword(token: TokenType): boolean {
 }
 
 export function tokenIsKeywordOrIdentifier(token: TokenType): boolean {
-  return token >= tt._in && token <= tt.name;
+  return token >= tt._in && token <= tt.placeholder;
 }
 
 export function tokenIsLiteralPropertyName(token: TokenType): boolean {
diff --git a/packages/babel-parser/test/fixtures/placeholders/expression/object/input.js b/packages/babel-parser/test/fixtures/placeholders/expression/object/input.js
new file mode 100644
index 000000000000..f8a717f8c5d6
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/placeholders/expression/object/input.js
@@ -0,0 +1,4 @@
+const a = {
+  %%key%%: 1,
+  [%%key2%%]: 2,
+}
diff --git a/packages/babel-parser/test/fixtures/placeholders/expression/object/output.json b/packages/babel-parser/test/fixtures/placeholders/expression/object/output.json
new file mode 100644
index 000000000000..0aa3dbc86b22
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/placeholders/expression/object/output.json
@@ -0,0 +1,90 @@
+{
+  "type": "File",
+  "start":0,"end":44,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":4,"column":1,"index":44}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":44,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":4,"column":1,"index":44}},
+    "sourceType": "script",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "VariableDeclaration",
+        "start":0,"end":44,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":4,"column":1,"index":44}},
+        "declarations": [
+          {
+            "type": "VariableDeclarator",
+            "start":6,"end":44,"loc":{"start":{"line":1,"column":6,"index":6},"end":{"line":4,"column":1,"index":44}},
+            "id": {
+              "type": "Identifier",
+              "start":6,"end":7,"loc":{"start":{"line":1,"column":6,"index":6},"end":{"line":1,"column":7,"index":7},"identifierName":"a"},
+              "name": "a"
+            },
+            "init": {
+              "type": "ObjectExpression",
+              "start":10,"end":44,"loc":{"start":{"line":1,"column":10,"index":10},"end":{"line":4,"column":1,"index":44}},
+              "properties": [
+                {
+                  "type": "ObjectProperty",
+                  "start":14,"end":24,"loc":{"start":{"line":2,"column":2,"index":14},"end":{"line":2,"column":12,"index":24}},
+                  "method": false,
+                  "key": {
+                    "type": "Placeholder",
+                    "start":14,"end":21,"loc":{"start":{"line":2,"column":2,"index":14},"end":{"line":2,"column":9,"index":21}},
+                    "name": {
+                      "type": "Identifier",
+                      "start":16,"end":19,"loc":{"start":{"line":2,"column":4,"index":16},"end":{"line":2,"column":7,"index":19},"identifierName":"key"},
+                      "name": "key"
+                    },
+                    "expectedNode": "Identifier"
+                  },
+                  "computed": false,
+                  "shorthand": false,
+                  "value": {
+                    "type": "NumericLiteral",
+                    "start":23,"end":24,"loc":{"start":{"line":2,"column":11,"index":23},"end":{"line":2,"column":12,"index":24}},
+                    "extra": {
+                      "rawValue": 1,
+                      "raw": "1"
+                    },
+                    "value": 1
+                  }
+                },
+                {
+                  "type": "ObjectProperty",
+                  "start":28,"end":41,"loc":{"start":{"line":3,"column":2,"index":28},"end":{"line":3,"column":15,"index":41}},
+                  "method": false,
+                  "computed": true,
+                  "key": {
+                    "type": "Placeholder",
+                    "start":29,"end":37,"loc":{"start":{"line":3,"column":3,"index":29},"end":{"line":3,"column":11,"index":37}},
+                    "name": {
+                      "type": "Identifier",
+                      "start":31,"end":35,"loc":{"start":{"line":3,"column":5,"index":31},"end":{"line":3,"column":9,"index":35},"identifierName":"key2"},
+                      "name": "key2"
+                    },
+                    "expectedNode": "Expression"
+                  },
+                  "shorthand": false,
+                  "value": {
+                    "type": "NumericLiteral",
+                    "start":40,"end":41,"loc":{"start":{"line":3,"column":14,"index":40},"end":{"line":3,"column":15,"index":41}},
+                    "extra": {
+                      "rawValue": 2,
+                      "raw": "2"
+                    },
+                    "value": 2
+                  }
+                }
+              ],
+              "extra": {
+                "trailingComma": 41
+              }
+            }
+          }
+        ],
+        "kind": "const"
+      }
+    ],
+    "directives": []
+  }
+}
diff --git a/packages/babel-parser/test/fixtures/placeholders/typescript/export-namespace/input.ts b/packages/babel-parser/test/fixtures/placeholders/typescript/export-namespace/input.ts
new file mode 100644
index 000000000000..bdc1733e2584
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/placeholders/typescript/export-namespace/input.ts
@@ -0,0 +1 @@
+export namespace %%foo%% { }
diff --git a/packages/babel-parser/test/fixtures/placeholders/typescript/export-namespace/output.json b/packages/babel-parser/test/fixtures/placeholders/typescript/export-namespace/output.json
new file mode 100644
index 000000000000..1450bca97477
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/placeholders/typescript/export-namespace/output.json
@@ -0,0 +1,43 @@
+{
+  "type": "File",
+  "start":0,"end":28,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":28,"index":28}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":28,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":28,"index":28}},
+    "sourceType": "module",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExportNamedDeclaration",
+        "start":0,"end":28,"loc":{"start":{"line":1,"column":0,"index":0},"end":{"line":1,"column":28,"index":28}},
+        "exportKind": "value",
+        "specifiers": [],
+        "source": null,
+        "declaration": {
+          "type": "TSModuleDeclaration",
+          "start":7,"end":28,"loc":{"start":{"line":1,"column":7,"index":7},"end":{"line":1,"column":28,"index":28}},
+          "kind": "namespace",
+          "id": {
+            "type": "Placeholder",
+            "start":17,"end":24,"loc":{"start":{"line":1,"column":17,"index":17},"end":{"line":1,"column":24,"index":24}},
+            "name": {
+              "type": "Identifier",
+              "start":19,"end":22,"loc":{"start":{"line":1,"column":19,"index":19},"end":{"line":1,"column":22,"index":22},"identifierName":"foo"},
+              "name": "foo"
+            },
+            "expectedNode": "Identifier"
+          },
+          "body": {
+            "type": "TSModuleBlock",
+            "start":25,"end":28,"loc":{"start":{"line":1,"column":25,"index":25},"end":{"line":1,"column":28,"index":28}},
+            "body": []
+          }
+        }
+      }
+    ],
+    "directives": [],
+    "extra": {
+      "topLevelAwait": false
+    }
+  }
+}