diff --git a/evaluate/report/collection.go b/evaluate/report/collection.go
index 4be27944..c533aa0d 100644
--- a/evaluate/report/collection.go
+++ b/evaluate/report/collection.go
@@ -20,6 +20,9 @@ type AssessmentPerModelPerLanguagePerRepository map[model.Model]map[language.Lan
 // AssessmentPerModel holds a collection of assessments per model.
 type AssessmentPerModel map[model.Model]metrics.Assessments
 
+// AssessmentPerLanguagePerModel holds a collection of assessments per language and model.
+type AssessmentPerLanguagePerModel map[language.Language]map[model.Model]metrics.Assessments
+
 // NewAssessmentPerModelPerLanguagePerRepository returns a new AssessmentPerModelPerLanguagePerRepository initialized with an empty assessment for each combination.
 func NewAssessmentPerModelPerLanguagePerRepository(models []model.Model, languages []language.Language, repositories []string) AssessmentPerModelPerLanguagePerRepository {
 	a := AssessmentPerModelPerLanguagePerRepository{}
@@ -85,6 +88,26 @@ func (a AssessmentPerModelPerLanguagePerRepository) CollapseByModel() Assessment
 	return perModel
 }
 
+// CollapseByLanguage returns all assessments aggregated per language and model.
+func (a AssessmentPerModelPerLanguagePerRepository) CollapseByLanguage() AssessmentPerLanguagePerModel {
+	assessments := AssessmentPerLanguagePerModel{}
+	_ = a.Walk(func(m model.Model, l language.Language, r string, a metrics.Assessments) error {
+		if _, ok := assessments[l]; !ok {
+			assessments[l] = map[model.Model]metrics.Assessments{}
+		}
+
+		if _, ok := assessments[l][m]; !ok {
+			assessments[l][m] = metrics.NewAssessments()
+		}
+
+		assessments[l][m].Add(a)
+
+		return nil
+	})
+
+	return assessments
+}
+
 // WalkByScore walks the given assessment metrics by their score.
 func WalkByScore(assessmentsPerModel AssessmentPerModel, function func(model model.Model, assessment metrics.Assessments, score uint) error) error {
 	models := maps.Keys(assessmentsPerModel)
diff --git a/evaluate/report/collection_test.go b/evaluate/report/collection_test.go
index f4f9b33c..11d44628 100644
--- a/evaluate/report/collection_test.go
+++ b/evaluate/report/collection_test.go
@@ -295,3 +295,89 @@ func TestAssessmentCollapseByModel(t *testing.T) {
 		},
 	})
 }
+
+func TestAssessmentCollapseByLanguage(t *testing.T) {
+	type testCase struct {
+		Name string
+
+		Assessments AssessmentPerModelPerLanguagePerRepository
+
+		ExpectedAssessmentPerLanguagePerModel AssessmentPerLanguagePerModel
+	}
+
+	validate := func(t *testing.T, tc *testCase) {
+		t.Run(tc.Name, func(t *testing.T) {
+			actualAssessmentPerLanguagePerModel := tc.Assessments.CollapseByLanguage()
+
+			assert.Equal(t, tc.ExpectedAssessmentPerLanguagePerModel, actualAssessmentPerLanguagePerModel)
+		})
+	}
+
+	modelA := modeltesting.NewMockModelNamed(t, "some-model-a")
+	modelB := modeltesting.NewMockModelNamed(t, "some-model-b")
+
+	languageA := languagetesting.NewMockLanguageNamed(t, "some-language-a")
+	languageB := languagetesting.NewMockLanguageNamed(t, "some-language-b")
+
+	validate(t, &testCase{
+		Name: "Collapse",
+
+		Assessments: AssessmentPerModelPerLanguagePerRepository{
+			modelA: {
+				languageA: {
+					"some-repository-a": metrics.Assessments{
+						metrics.AssessmentKeyResponseNoExcess: 1,
+					},
+					"some-repository-b": metrics.Assessments{
+						metrics.AssessmentKeyResponseNoExcess: 2,
+					},
+				},
+				languageB: {
+					"some-repository-a": metrics.Assessments{
+						metrics.AssessmentKeyResponseNoExcess: 3,
+					},
+					"some-repository-b": metrics.Assessments{
+						metrics.AssessmentKeyResponseNoExcess: 4,
+					},
+				},
+			},
+			modelB: {
+				languageA: {
+					"some-repository-a": metrics.Assessments{
+						metrics.AssessmentKeyResponseNoExcess: 5,
+					},
+					"some-repository-b": metrics.Assessments{
+						metrics.AssessmentKeyResponseNoExcess: 6,
+					},
+				},
+				languageB: {
+					"some-repository-a": metrics.Assessments{
+						metrics.AssessmentKeyResponseNoExcess: 7,
+					},
+					"some-repository-b": metrics.Assessments{
+						metrics.AssessmentKeyResponseNoExcess: 8,
+					},
+				},
+			},
+		},
+
+		ExpectedAssessmentPerLanguagePerModel: AssessmentPerLanguagePerModel{
+			languageA: map[model.Model]metrics.Assessments{
+				modelA: {
+					metrics.AssessmentKeyResponseNoExcess: 3,
+				},
+				modelB: {
+					metrics.AssessmentKeyResponseNoExcess: 11,
+				},
+			},
+			languageB: map[model.Model]metrics.Assessments{
+				modelA: {
+					metrics.AssessmentKeyResponseNoExcess: 7,
+				},
+				modelB: {
+					metrics.AssessmentKeyResponseNoExcess: 15,
+				},
+			},
+		},
+	})
+}