diff --git a/typings/intl_format_cache/index.d.ts b/typings/intl_format_cache/index.d.ts
new file mode 100644
index 000000000000000..f5a7f16879601e9
--- /dev/null
+++ b/typings/intl_format_cache/index.d.ts
@@ -0,0 +1,32 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+declare module 'intl-format-cache' {
+  import IntlMessageFormat from 'intl-messageformat';
+
+  interface Message {
+    format: (values: Record<string, string | number | boolean | Date | null | undefined>) => string;
+  }
+
+  function memoizeIntlConstructor(
+    IntlMessageFormatCtor: typeof IntlMessageFormat
+  ): (msg: string, locale: string, formats: any) => Message;
+
+  export = memoizeIntlConstructor;
+}
diff --git a/typings/intl_relativeformat/index.d.ts b/typings/intl_relativeformat/index.d.ts
new file mode 100644
index 000000000000000..784b975c7813133
--- /dev/null
+++ b/typings/intl_relativeformat/index.d.ts
@@ -0,0 +1,22 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+declare module 'intl-relativeformat' {
+  export let defaultLocale: string;
+}