mongodb · andf-mongodb · Mar 29, 2021 · Mar 29, 2021
diff --git a/source/core/read-isolation-consistency-recency.txt b/source/core/read-isolation-consistency-recency.txt
@@ -270,6 +270,15 @@ document with the old ``sku`` value needs to be updated with the
 ``sku`` value. The client can use a causally consistent session to
 ensure that the update occurs before the insert.
 
+----------
+
+.. |arrow| unicode:: U+27A4
+
+|arrow| Use the **Select your language** drop-down menu in the
+upper-right to set the language of this example.
+
+----------
+
 .. tabs-pillstrip:: languages
 
 .. tabs-drivers::

diff --git a/source/core/transactions-in-applications.txt b/source/core/transactions-in-applications.txt
@@ -42,14 +42,26 @@ The :ref:`txn-core-api`:
 Callback API
 -------------
 
-The new callback API incorporates logic:
+The callback API incorporates logic:
 
 - To retry the transaction as a whole if the transaction encounters a
   :ref:`transient-transaction-error`.
 
 - To retry the commit operation if the commit encounters an
   :ref:`unknown-transaction-commit-result`.
 
+Example
+~~~~~~~
+
+----------
+
+.. |arrow| unicode:: U+27A4
+
+|arrow| Use the **Select your language** drop-down menu in the
+upper-right to set the language of the examples on this page.
+
+----------
+
 .. tabs-pillstrip:: languages
 
 .. tabs-drivers::
@@ -328,6 +340,16 @@ labeled:
   To handle :ref:`unknown-transaction-commit-result`,
   applications should explicitly incorporate retry logic for the error.
 
+Example
+~~~~~~~
+
+----------
+
+|arrow| Use the **Select your language** drop-down menu in the
+upper-right to set the language of the examples on this page.
+
+----------
+
 The following example incorporates logic to retry the transaction for
 transient errors and retry the commit for unknown commit error:
 

diff --git a/source/core/transactions.txt b/source/core/transactions.txt
@@ -31,9 +31,16 @@ databases, documents, and shards.
 Transactions API
 ----------------
 
-The following example highlights the key components
-of the transactions API:
+This example highlights the key components of the transactions API.
 
+----------
+
+.. |arrow| unicode:: U+27A4
+
+|arrow| Use the **Select your language** drop-down menu in the
+upper-right to set the language of the following example.
+
+----------
 
 .. tabs-pillstrip:: languages
 

diff --git a/source/tutorial/insert-documents.txt b/source/tutorial/insert-documents.txt
@@ -13,7 +13,14 @@ Insert Documents
    :description: Insert documents using MongoDB. Creates collection upon first insert.
    :keywords: insert documents, create documents, insert into collection, create collection
 
-This page provides examples in:
+----------
+
+.. |arrow| unicode:: U+27A4
+
+|arrow| Use the **Select your language** drop-down menu in the
+upper-right to set the language of the examples on this page.
+
+----------
 
 .. tabs-pillstrip:: languages
 
@@ -331,6 +338,13 @@ To retrieve the document that you just inserted, :ref:`query the collection
 Insert Multiple Documents
 -------------------------
 
+----------
+
+|arrow| Use the **Select your language** drop-down menu in the
+upper-right to set the language of the examples on this page.
+
+----------
+
 .. tabs-drivers::
 
    tabs:

diff --git a/source/tutorial/project-fields-from-query-results.txt b/source/tutorial/project-fields-from-query-results.txt
@@ -11,7 +11,14 @@ Project Fields to Return from Query
 
 .. default-domain:: mongodb
 
-This page provides examples in:
+----------
+
+.. |arrow| unicode:: U+27A4
+
+|arrow| Use the **Select your language** drop-down menu in the
+upper-right to set the language of the following examples.
+
+----------
 
 .. tabs-pillstrip:: languages
 

diff --git a/source/tutorial/query-array-of-documents.txt b/source/tutorial/query-array-of-documents.txt
@@ -13,7 +13,14 @@ Query an Array of Embedded Documents
    :description: MongoDB Manual - how to query an array of documents,  how to query an array of nested documents,  how to query an array of embedded documents.
    :keywords: array of nested documents, array of embedded documents, array of documents, nested documents, array index, select, array, array elements, array items
 
-This page provides examples in: 
+----------
+
+.. |arrow| unicode:: U+27A4
+
+|arrow| Use the **Select your language** drop-down menu in the
+upper-right to set the language of the following examples.
+
+----------
 
 .. tabs-pillstrip:: languages
 

diff --git a/source/tutorial/query-arrays.txt b/source/tutorial/query-arrays.txt
@@ -13,7 +13,14 @@ Query an Array
    :description: MongoDB Manual - How to query an array: query on the array field as a whole, check if element in array, query for array element, query if field in array, query by array size.
    :keywords: array, array elements, array items, queries, select, MongoDB Manual, query an array, query for items in array
 
-This page provides examples in: 
+----------
+
+.. |arrow| unicode:: U+27A4
+
+|arrow| Use the **Select your language** drop-down menu in the
+upper-right to set the language of the following examples.
+
+----------
 
 .. tabs-pillstrip:: languages
 

diff --git a/source/tutorial/query-documents.txt b/source/tutorial/query-documents.txt
@@ -14,7 +14,14 @@ Query Documents
    :description: MongoDB  Manual. How do I query documents, query top level fields, perform equality match, query with query operators, specify compound query conditions.
    :keywords: query, select from collection, select all, select conditions, filters, select where, criteria, greater than, less than, MongoDB Manual
 
-This page provides examples in:
+----------
+
+.. |arrow| unicode:: U+27A4
+
+|arrow| Use the **Select your language** drop-down menu in the
+upper-right to set the language of the following examples.
+
+----------
 
 .. tabs-pillstrip:: languages
 

diff --git a/source/tutorial/query-embedded-documents.txt b/source/tutorial/query-embedded-documents.txt
@@ -14,7 +14,14 @@ Query on Embedded/Nested Documents
    :description: MongoDB Manual: How to query on embedded documents/nested documents/subdocuments/nested fields. Query/select by embedded documents/nested fields/subdocuments.
    :keywords: filter on embedded documents, nested documents, subdocuments, nested fields, field is embedded document, queries, select, MongoDB, greater than, logical AND, compound conditions, select from collection
 
-This page provides examples in:
+----------
+
+.. |arrow| unicode:: U+27A4
+
+|arrow| Use the **Select your language** drop-down menu in the
+upper-right to set the language of the following examples.
+
+----------
 
 .. tabs-pillstrip:: languages
 

diff --git a/source/tutorial/query-for-null-fields.txt b/source/tutorial/query-for-null-fields.txt
@@ -9,7 +9,14 @@ Query for Null or Missing Fields
 
 .. default-domain:: mongodb
 
-This page provides examples in: 
+----------
+
+.. |arrow| unicode:: U+27A4
+
+|arrow| Use the **Select your language** drop-down menu in the
+upper-right to set the language of the following examples.
+
+----------
 
 .. tabs-pillstrip:: languages
 

diff --git a/source/tutorial/remove-documents.txt b/source/tutorial/remove-documents.txt
@@ -13,7 +13,14 @@ Delete Documents
    :description: MongoDB Manual: How to delete documents in MongoDB. How to remove documents in MongoDB. How to specify conditions for removing or deleting documents in MongoDB.
    :keywords: delete from collection, remove documents from collection, delete documents from collection, MongoDB Manual
 
-This page provides examples in:
+----------
+
+.. |arrow| unicode:: U+27A4
+
+|arrow| Use the **Select your language** drop-down menu in the
+upper-right to set the language of the following examples.
+
+----------
 
 .. tabs-pillstrip:: languages
 

diff --git a/source/tutorial/update-documents.txt b/source/tutorial/update-documents.txt
@@ -13,7 +13,14 @@ Update Documents
    :description: How to update documents in MongoDB. How to update  a single document in MongoDB. How to update multiple documents in MongoDB. How to update all documents in MongoDB. How to update fields in documents in MongoDB. How to replace documents.
    :keywords: update documents, update all documents, update single document, modify documents, update fields in documents, update collection, MongoDB Manual
 
-This page provides examples in:
+----------
+
+.. |arrow| unicode:: U+27A4
+
+|arrow| Use the **Select your language** drop-down menu in the
+upper-right to set the language of the following examples.
+
+----------
 
 .. |populate-inventory| replace:: The examples on this page use the
    ``inventory`` collection. To create and/or populate the