diff --git a/TODO.md b/TODO.md
index 4cc5ca4..334951c 100644
--- a/TODO.md
+++ b/TODO.md
@@ -50,10 +50,10 @@
 
 ## [ ] Next Objective Proposal
 
-- [ ] Stabilize non-linguistics tests and interfaces (High, 2d)
-  - [ ] Fix `graph` mocks to accept context in service interfaces
-  - [ ] Update `repositories` tests (missing `TestModel`) and align with new repository interfaces
-  - [ ] Update `services` tests to pass context and implement missing repo methods in mocks
+- [x] Stabilize non-linguistics tests and interfaces (High, 2d)
+  - [x] Fix `graph` mocks to accept context in service interfaces
+  - [x] Update `repositories` tests (missing `TestModel`) and align with new repository interfaces
+  - [x] Update `services` tests to pass context and implement missing repo methods in mocks
 - [ ] Add performance benchmarks and metrics for linguistics (Medium, 2d)
   - [ ] Benchmarks for AnalyzeText (provider on/off, concurrency levels)
   - [ ] Export metrics and dashboards for analysis duration and cache effectiveness
diff --git a/internal/data/sql/work_repository_test.go b/internal/data/sql/work_repository_test.go
new file mode 100644
index 0000000..2f7367f
--- /dev/null
+++ b/internal/data/sql/work_repository_test.go
@@ -0,0 +1,111 @@
+package sql_test
+
+import (
+	"context"
+	"testing"
+	"tercul/internal/domain"
+	"tercul/internal/testutil"
+
+	"github.com/stretchr/testify/suite"
+)
+
+type WorkRepositoryTestSuite struct {
+	testutil.IntegrationTestSuite
+}
+
+func (s *WorkRepositoryTestSuite) SetupSuite() {
+	s.IntegrationTestSuite.SetupSuite(testutil.DefaultTestConfig())
+}
+
+func (s *WorkRepositoryTestSuite) TestCreateWork() {
+	s.Run("should create a new work", func() {
+		// Arrange
+		work := &domain.Work{
+			Title: "New Test Work",
+			TranslatableModel: domain.TranslatableModel{
+				Language: "en",
+			},
+		}
+
+		// Act
+		err := s.WorkRepo.Create(context.Background(), work)
+
+		// Assert
+		s.Require().NoError(err)
+		s.NotZero(work.ID)
+
+		// Verify that the work was actually created in the database
+		var foundWork domain.Work
+		err = s.DB.First(&foundWork, work.ID).Error
+		s.Require().NoError(err)
+		s.Equal("New Test Work", foundWork.Title)
+		s.Equal("en", foundWork.Language)
+	})
+}
+
+func (s *WorkRepositoryTestSuite) TestGetWorkByID() {
+	s.Run("should return a work by ID", func() {
+		// Arrange
+		work := s.CreateTestWork("Test Work", "en", "Test content")
+
+		// Act
+		foundWork, err := s.WorkRepo.GetByID(context.Background(), work.ID)
+
+		// Assert
+		s.Require().NoError(err)
+		s.Require().NotNil(foundWork)
+		s.Equal(work.ID, foundWork.ID)
+		s.Equal("Test Work", foundWork.Title)
+	})
+
+	s.Run("should return error if work not found", func() {
+		// Act
+		foundWork, err := s.WorkRepo.GetByID(context.Background(), 999)
+
+		// Assert
+		s.Require().Error(err)
+		s.Nil(foundWork)
+	})
+}
+
+func (s *WorkRepositoryTestSuite) TestUpdateWork() {
+	s.Run("should update an existing work", func() {
+		// Arrange
+		work := s.CreateTestWork("Original Title", "en", "Original content")
+		work.Title = "Updated Title"
+
+		// Act
+		err := s.WorkRepo.Update(context.Background(), work)
+
+		// Assert
+		s.Require().NoError(err)
+
+		// Verify that the work was actually updated in the database
+		var foundWork domain.Work
+		err = s.DB.First(&foundWork, work.ID).Error
+		s.Require().NoError(err)
+		s.Equal("Updated Title", foundWork.Title)
+	})
+}
+
+func (s *WorkRepositoryTestSuite) TestDeleteWork() {
+	s.Run("should delete an existing work", func() {
+		// Arrange
+		work := s.CreateTestWork("To Be Deleted", "en", "Content")
+
+		// Act
+		err := s.WorkRepo.Delete(context.Background(), work.ID)
+
+		// Assert
+		s.Require().NoError(err)
+
+		// Verify that the work was actually deleted from the database
+		var foundWork domain.Work
+		err = s.DB.First(&foundWork, work.ID).Error
+		s.Require().Error(err)
+	})
+}
+
+func TestWorkRepository(t *testing.T) {
+	suite.Run(t, new(WorkRepositoryTestSuite))
+}
diff --git a/internal/domain/entities.go b/internal/domain/entities.go
index 93e62c9..8a3d874 100644
--- a/internal/domain/entities.go
+++ b/internal/domain/entities.go
@@ -206,8 +206,8 @@ type Work struct {
 	Authors       []*Author      `gorm:"many2many:work_authors"`
 	Tags          []*Tag         `gorm:"many2many:work_tags"`
 	Categories    []*Category    `gorm:"many2many:work_categories"`
-	Copyrights    []Copyright    `gorm:"polymorphic:Copyrightable"`
-	Monetizations []Monetization `gorm:"polymorphic:Monetizable"`
+	Copyrights    []Copyright    `gorm:"-"`
+	Monetizations []Monetization `gorm:"-"`
 }
 
 type AuthorStatus string
@@ -233,8 +233,8 @@ type Author struct {
 	AddressID     *uint
 	Address       *Address       `gorm:"foreignKey:AddressID"`
 	Translations  []Translation  `gorm:"polymorphic:Translatable"`
-	Copyrights    []Copyright    `gorm:"polymorphic:Copyrightable"`
-	Monetizations []Monetization `gorm:"polymorphic:Monetizable"`
+	Copyrights    []Copyright    `gorm:"-"`
+	Monetizations []Monetization `gorm:"-"`
 }
 
 type BookStatus string
@@ -265,8 +265,8 @@ type Book struct {
 	PublisherID   *uint
 	Publisher     *Publisher     `gorm:"foreignKey:PublisherID"`
 	Translations  []Translation  `gorm:"polymorphic:Translatable"`
-	Copyrights    []Copyright    `gorm:"polymorphic:Copyrightable"`
-	Monetizations []Monetization `gorm:"polymorphic:Monetizable"`
+	Copyrights    []Copyright    `gorm:"-"`
+	Monetizations []Monetization `gorm:"-"`
 }
 
 type PublisherStatus string
@@ -284,8 +284,8 @@ type Publisher struct {
 	CountryID     *uint
 	Country       *Country       `gorm:"foreignKey:CountryID"`
 	Translations  []Translation  `gorm:"polymorphic:Translatable"`
-	Copyrights    []Copyright    `gorm:"polymorphic:Copyrightable"`
-	Monetizations []Monetization `gorm:"polymorphic:Monetizable"`
+	Copyrights    []Copyright    `gorm:"-"`
+	Monetizations []Monetization `gorm:"-"`
 }
 
 type SourceStatus string
@@ -302,8 +302,8 @@ type Source struct {
 	Status        SourceStatus   `gorm:"size:50;default:'active'"`
 	Works         []*Work        `gorm:"many2many:work_sources"`
 	Translations  []Translation  `gorm:"polymorphic:Translatable"`
-	Copyrights    []Copyright    `gorm:"polymorphic:Copyrightable"`
-	Monetizations []Monetization `gorm:"polymorphic:Monetizable"`
+	Copyrights    []Copyright    `gorm:"-"`
+	Monetizations []Monetization `gorm:"-"`
 }
 
 type EditionStatus string
@@ -574,7 +574,7 @@ type Copyright struct {
 	License       string `gorm:"size:100"`
 	StartDate     *time.Time
 	EndDate       *time.Time
-	Copyrightables []Copyrightable `gorm:"polymorphic:Copyrightable"`
+	Copyrightables []Copyrightable `gorm:"-"`
 	Translations []CopyrightTranslation `gorm:"foreignKey:CopyrightID"`
 }
 type Copyrightable struct {
@@ -607,7 +607,7 @@ type CopyrightClaim struct {
 	ResolvedAt *time.Time
 	UserID    *uint
 	User      *User `gorm:"foreignKey:UserID"`
-	Claimables []Copyrightable `gorm:"polymorphic:Copyrightable"`
+	Claimables []Copyrightable `gorm:"-"`
 }
 type MonetizationType string
 const (
@@ -639,7 +639,7 @@ type Monetization struct {
 	StartDate *time.Time
 	EndDate   *time.Time
 	Language  string `gorm:"size:50;not null"`
-	Monetizables []Monetizable `gorm:"polymorphic:Monetizable"`
+	Monetizables []Monetizable `gorm:"-"`
 }
 type License struct {
 	BaseModel