From c51c5e0350dfa822bb5746cddbbf2e272d08cb35 Mon Sep 17 00:00:00 2001
From: rtibblesbot <richard+githubagent@learningequality.org>
Date: Tue, 18 Aug 2026 17:03:35 -0700
Subject: [PATCH] fix: serialise QTI item language as xml:lang
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

QTI 3.0 declares xml:lang on qti-assessment-item; `language` is not an
attribute of the element. Renaming the pydantic field to `xml__lang` is
enough — XMLElement.to_element already maps `__` to `:`.

Exercise zip checksums shift because the generated XML changed.
---
 .../qti/fixtures/free_response_no_answers.xml |  2 +-
 .../qti/fixtures/free_response_with_maths.xml |  2 +-
 .../utils/qti/fixtures/input_question.xml     |  2 +-
 .../math_content_choice_interaction.xml       |  2 +-
 .../utils/qti/fixtures/multiple_selection.xml |  2 +-
 .../utils/qti/fixtures/single_selection.xml   |  2 +-
 .../tests/utils/qti/fixtures/true_false.xml   |  2 +-
 .../tests/utils/qti/test_assessment_items.py  | 22 +++++++++----------
 .../tests/utils/qti/test_qti.py               |  4 ++--
 .../tests/utils/qti/test_validation.py        |  2 +-
 .../tests/utils/test_exercise_creation.py     |  6 ++---
 .../utils/assessment/qti/assessment_item.py   |  2 +-
 .../utils/assessment/qti/convert.py           |  4 ++--
 13 files changed, 27 insertions(+), 27 deletions(-)

diff --git a/contentcuration/contentcuration/tests/utils/qti/fixtures/free_response_no_answers.xml b/contentcuration/contentcuration/tests/utils/qti/fixtures/free_response_no_answers.xml
index 0fb625636a..70b1c0ca89 100644
--- a/contentcuration/contentcuration/tests/utils/qti/fixtures/free_response_no_answers.xml
+++ b/contentcuration/contentcuration/tests/utils/qti/fixtures/free_response_no_answers.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="K_ty6CYdlQyH-3LoJh2VDIQ" title="Test Question 1" adaptive="false" time-dependent="false" language="en-US" tool-name="kolibri" tool-version="0.1">
+<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="K_ty6CYdlQyH-3LoJh2VDIQ" title="Test Question 1" adaptive="false" time-dependent="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1">
     <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="string" />
     <qti-outcome-declaration identifier="SCORE" cardinality="single" base-type="float" />
     <qti-item-body>
diff --git a/contentcuration/contentcuration/tests/utils/qti/fixtures/free_response_with_maths.xml b/contentcuration/contentcuration/tests/utils/qti/fixtures/free_response_with_maths.xml
index 898dc86ce5..900e7e1a16 100644
--- a/contentcuration/contentcuration/tests/utils/qti/fixtures/free_response_with_maths.xml
+++ b/contentcuration/contentcuration/tests/utils/qti/fixtures/free_response_with_maths.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="K_ty6CYdlQyH-3LoJh2VDIQ" title="Test Question 1" adaptive="false" time-dependent="false" language="en-US" tool-name="kolibri" tool-version="0.1">
+<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="K_ty6CYdlQyH-3LoJh2VDIQ" title="Test Question 1" adaptive="false" time-dependent="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1">
     <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="string">
         <qti-correct-response>
             <qti-value>Nothing</qti-value>
diff --git a/contentcuration/contentcuration/tests/utils/qti/fixtures/input_question.xml b/contentcuration/contentcuration/tests/utils/qti/fixtures/input_question.xml
index 1839fad96d..1c37bd0613 100644
--- a/contentcuration/contentcuration/tests/utils/qti/fixtures/input_question.xml
+++ b/contentcuration/contentcuration/tests/utils/qti/fixtures/input_question.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="K_ty6CYdlQyH-3LoJh2VDIQ" title="Test Question 1" adaptive="false" time-dependent="false" language="en-US" tool-name="kolibri" tool-version="0.1">
+<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="K_ty6CYdlQyH-3LoJh2VDIQ" title="Test Question 1" adaptive="false" time-dependent="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1">
     <qti-response-declaration identifier="RESPONSE" cardinality="multiple" base-type="float">
         <qti-correct-response>
             <qti-value>1</qti-value>
diff --git a/contentcuration/contentcuration/tests/utils/qti/fixtures/math_content_choice_interaction.xml b/contentcuration/contentcuration/tests/utils/qti/fixtures/math_content_choice_interaction.xml
index d439354dac..d38a9b7b2c 100644
--- a/contentcuration/contentcuration/tests/utils/qti/fixtures/math_content_choice_interaction.xml
+++ b/contentcuration/contentcuration/tests/utils/qti/fixtures/math_content_choice_interaction.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="K3d3d3d3d3d3d3d3d3d3d3Q" title="Test Question 1" adaptive="false" time-dependent="false" language="en-US" tool-name="kolibri" tool-version="0.1">
+<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="K3d3d3d3d3d3d3d3d3d3d3Q" title="Test Question 1" adaptive="false" time-dependent="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1">
     <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="identifier">
         <qti-correct-response>
             <qti-value>choice_0</qti-value>
diff --git a/contentcuration/contentcuration/tests/utils/qti/fixtures/multiple_selection.xml b/contentcuration/contentcuration/tests/utils/qti/fixtures/multiple_selection.xml
index 44a4367aa6..452d7b5104 100644
--- a/contentcuration/contentcuration/tests/utils/qti/fixtures/multiple_selection.xml
+++ b/contentcuration/contentcuration/tests/utils/qti/fixtures/multiple_selection.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="Kq83vEjRWeJCrze8SNFZ4kA" title="Test Question 1" adaptive="false" time-dependent="false" language="en-US" tool-name="kolibri" tool-version="0.1">
+<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="Kq83vEjRWeJCrze8SNFZ4kA" title="Test Question 1" adaptive="false" time-dependent="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1">
     <qti-response-declaration identifier="RESPONSE" cardinality="multiple" base-type="identifier">
         <qti-correct-response>
             <qti-value>choice_0</qti-value>
diff --git a/contentcuration/contentcuration/tests/utils/qti/fixtures/single_selection.xml b/contentcuration/contentcuration/tests/utils/qti/fixtures/single_selection.xml
index 00147521fb..fe4795f269 100644
--- a/contentcuration/contentcuration/tests/utils/qti/fixtures/single_selection.xml
+++ b/contentcuration/contentcuration/tests/utils/qti/fixtures/single_selection.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="KEjRWeJCrze8SNFZ4kKvN7w" title="Test Question 1" adaptive="false" time-dependent="false" language="en-US" tool-name="kolibri" tool-version="0.1">
+<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="KEjRWeJCrze8SNFZ4kKvN7w" title="Test Question 1" adaptive="false" time-dependent="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1">
     <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="identifier">
         <qti-correct-response>
             <qti-value>choice_0</qti-value>
diff --git a/contentcuration/contentcuration/tests/utils/qti/fixtures/true_false.xml b/contentcuration/contentcuration/tests/utils/qti/fixtures/true_false.xml
index 0cdfcad547..5ea2bcd422 100644
--- a/contentcuration/contentcuration/tests/utils/qti/fixtures/true_false.xml
+++ b/contentcuration/contentcuration/tests/utils/qti/fixtures/true_false.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="KEjRWeJCrze8SNFZ4kKvN7w" title="Test Question 1" adaptive="false" time-dependent="false" language="en-US" tool-name="kolibri" tool-version="0.1">
+<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="KEjRWeJCrze8SNFZ4kKvN7w" title="Test Question 1" adaptive="false" time-dependent="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1">
     <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="identifier">
         <qti-correct-response>
             <qti-value>choice_0</qti-value>
diff --git a/contentcuration/contentcuration/tests/utils/qti/test_assessment_items.py b/contentcuration/contentcuration/tests/utils/qti/test_assessment_items.py
index cdcb3f5cd2..4bc4fc1bb9 100644
--- a/contentcuration/contentcuration/tests/utils/qti/test_assessment_items.py
+++ b/contentcuration/contentcuration/tests/utils/qti/test_assessment_items.py
@@ -56,7 +56,7 @@ def test_assessment_item_with_catalog_info_orders_between_item_body_and_response
         assessment_item = AssessmentItem(
             identifier="item1",
             title="Test",
-            language="en-US",
+            xml__lang="en-US",
             item_body=item_body,
             catalog_info=catalog_info,
             response_processing=response_processing,
@@ -78,7 +78,7 @@ def test_true_false_question(self):
  title="BG true false example "
  adaptive="false"
  time-dependent="false"
- language="en-US"
+ xml:lang="en-US"
  tool-name="kolibri"
  tool-version="0.1">
 <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="identifier">
@@ -139,7 +139,7 @@ def test_true_false_question(self):
         assessment_item = AssessmentItem(
             identifier="beginnersguide007",
             title="BG true false example ",
-            language="EN-US",
+            xml__lang="EN-US",
             time_dependent=False,
             item_body=item_body,
             response_declaration=[response_declaration],
@@ -162,7 +162,7 @@ def test_multiple_choice_question(self):
  title="BG Choice example"
  adaptive="false"
  time-dependent="false"
- language="en-US"
+ xml:lang="en-US"
  tool-name="kolibri"
  tool-version="0.1">
 <qti-response-declaration identifier="RESPONSE" cardinality="multiple" base-type="identifier">
@@ -257,7 +257,7 @@ def test_multiple_choice_question(self):
         assessment_item = AssessmentItem(
             identifier="beginnersguide008",
             title="BG Choice example",
-            language="EN-US",
+            xml__lang="EN-US",
             time_dependent=False,
             item_body=item_body,
             response_declaration=[response_declaration],
@@ -277,7 +277,7 @@ def test_long_text_question(self):
  title="BG Postcard example"
  adaptive="false"
  time-dependent="false"
- language="en-US"
+ xml:lang="en-US"
  tool-name="kolibri"
  tool-version="0.1">
 <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="string" />
@@ -350,7 +350,7 @@ def test_long_text_question(self):
         assessment_item = AssessmentItem(
             identifier="beginnersguide009",
             title="BG Postcard example",
-            language="en-US",
+            xml__lang="en-US",
             time_dependent=False,
             item_body=item_body,
             response_declaration=[response_declaration],
@@ -369,7 +369,7 @@ def test_missing_word_question(self):
  title="BG Missing Word example"
  adaptive="false"
  time-dependent="false"
- language="en-US"
+ xml:lang="en-US"
  tool-name="kolibri"
  tool-version="0.1">
 <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="string">
@@ -460,7 +460,7 @@ def test_missing_word_question(self):
         assessment_item = AssessmentItem(
             identifier="beginnersguide010",
             title="BG Missing Word example",
-            language="en-US",
+            xml__lang="en-US",
             time_dependent=False,
             item_body=item_body,
             response_declaration=[response_declaration],
@@ -480,7 +480,7 @@ def test_numerical_entry_question(self):
  title="Numerical Entry Question"
  adaptive="false"
  time-dependent="false"
- language="en-US"
+ xml:lang="en-US"
  tool-name="kolibri"
  tool-version="0.1">
 <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="float">
@@ -525,7 +525,7 @@ def test_numerical_entry_question(self):
         assessment_item = AssessmentItem(
             identifier="numerical-entry-item",
             title="Numerical Entry Question",
-            language="en-US",
+            xml__lang="en-US",
             time_dependent=False,
             item_body=ItemBody(
                 children=[
diff --git a/contentcuration/contentcuration/tests/utils/qti/test_qti.py b/contentcuration/contentcuration/tests/utils/qti/test_qti.py
index 61f7fc700e..a21fce87cf 100644
--- a/contentcuration/contentcuration/tests/utils/qti/test_qti.py
+++ b/contentcuration/contentcuration/tests/utils/qti/test_qti.py
@@ -220,10 +220,10 @@ def test_assessment_item_element(self):
         assessment_item_element = AssessmentItem(
             identifier="item_1",
             title="Test Assessment Item",
-            language="en-US",
+            xml__lang="en-US",
             item_body=item_body,
         )
-        expected_xml = '<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="item_1" title="Test Assessment Item" adaptive="false" language="en-US" tool-name="kolibri" tool-version="0.1"><qti-item-body><p>Test Item Body Content</p></qti-item-body></qti-assessment-item>'  # noqa: E501
+        expected_xml = '<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="item_1" title="Test Assessment Item" adaptive="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1"><qti-item-body><p>Test Item Body Content</p></qti-item-body></qti-assessment-item>'  # noqa: E501
         self.assertEqual(assessment_item_element.to_xml_string(), expected_xml)
 
     def test_prompt_element(self):
diff --git a/contentcuration/contentcuration/tests/utils/qti/test_validation.py b/contentcuration/contentcuration/tests/utils/qti/test_validation.py
index c18ccb277d..4589b2b098 100644
--- a/contentcuration/contentcuration/tests/utils/qti/test_validation.py
+++ b/contentcuration/contentcuration/tests/utils/qti/test_validation.py
@@ -24,7 +24,7 @@ def _item_xml(identifier, title, response_declaration, item_body):
         'xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 '
         'https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" '
         'identifier="%s" title="%s" adaptive="false" time-dependent="false" '
-        'language="en-US" tool-name="kolibri" tool-version="0.1">'
+        'xml:lang="en-US" tool-name="kolibri" tool-version="0.1">'
         "%s"
         '<qti-outcome-declaration identifier="SCORE" cardinality="single" base-type="float" />'
         "<qti-item-body>%s</qti-item-body>"
diff --git a/contentcuration/contentcuration/tests/utils/test_exercise_creation.py b/contentcuration/contentcuration/tests/utils/test_exercise_creation.py
index 17541d8ba3..c74361a9b3 100644
--- a/contentcuration/contentcuration/tests/utils/test_exercise_creation.py
+++ b/contentcuration/contentcuration/tests/utils/test_exercise_creation.py
@@ -1637,7 +1637,7 @@ def test_exercise_with_image(self):
             _normalize_xml(actual_manifest_xml),
         )
 
-        self.assertEqual(exercise_file.checksum, "cd5a770d35fa1c25092331ee00f4ce4a")
+        self.assertEqual(exercise_file.checksum, "08f316508478ea4710b96473d0e5e1f3")
 
     def test_image_resizing(self):
         # Create a base image file
@@ -1707,7 +1707,7 @@ def test_image_resizing(self):
 
         # Expected QTI item XML content with MathML conversion
         expected_item_xml = f"""<?xml version="1.0" encoding="UTF-8"?>
-        <qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="{qti_id}" title="Test QTI Exercise 1" adaptive="false" time-dependent="false" language="en-US" tool-name="kolibri" tool-version="0.1">
+        <qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="{qti_id}" title="Test QTI Exercise 1" adaptive="false" time-dependent="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1">
         <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="identifier">
         <qti-correct-response>
         <qti-value>choice_0</qti-value>
@@ -1843,7 +1843,7 @@ def test_multiple_question_types_mixed(self):
             _normalize_xml(actual_manifest_xml),
         )
 
-        self.assertEqual(exercise_file.checksum, "f15370f74b06b59bca6e289fe0e9cb87")
+        self.assertEqual(exercise_file.checksum, "f4689243ba9f9b5e1abdc874d2d7527d")
 
     def test_unsupported_question_type(self):
         """Test that unsupported question types raise appropriate errors"""
diff --git a/contentcuration/contentcuration/utils/assessment/qti/assessment_item.py b/contentcuration/contentcuration/utils/assessment/qti/assessment_item.py
index 87d29cc268..20796ab6d6 100644
--- a/contentcuration/contentcuration/utils/assessment/qti/assessment_item.py
+++ b/contentcuration/contentcuration/utils/assessment/qti/assessment_item.py
@@ -282,7 +282,7 @@ class AssessmentItem(QTIBase):
     label: Optional[str] = None
     adaptive: bool = False
     time_dependent: Optional[bool] = None
-    language: BCP47Language
+    xml__lang: BCP47Language
     tool_name: str = "kolibri"
     tool_version: str = "0.1"
 
diff --git a/contentcuration/contentcuration/utils/assessment/qti/convert.py b/contentcuration/contentcuration/utils/assessment/qti/convert.py
index 2a64cd251f..d363f3735f 100644
--- a/contentcuration/contentcuration/utils/assessment/qti/convert.py
+++ b/contentcuration/contentcuration/utils/assessment/qti/convert.py
@@ -244,7 +244,7 @@ def build_perseus_custom_interaction_item(
     item = AssessmentItem(
         identifier=identifier,
         title=title,
-        language=language,
+        xml__lang=language,
         adaptive=False,
         time_dependent=False,
         response_declaration=[
@@ -327,7 +327,7 @@ def convert_legacy_assessment_item_to_qti(
     qti_item = AssessmentItem(
         identifier=qti_item_id,
         title=item.title,
-        language=item.language,
+        xml__lang=item.language,
         adaptive=False,
         time_dependent=False,
         response_declaration=[response_declaration],