diff --git a/Apis/cv-matcher-data/Migrations/20260529111000_UpdateResultsUniqueConstraintToIncludeLanguage.Designer.cs b/Apis/cv-matcher-data/Migrations/20260529111000_UpdateResultsUniqueConstraintToIncludeLanguage.Designer.cs
new file mode 100644
index 0000000..560b81f
--- /dev/null
+++ b/Apis/cv-matcher-data/Migrations/20260529111000_UpdateResultsUniqueConstraintToIncludeLanguage.Designer.cs
@@ -0,0 +1,130 @@
+// <auto-generated />
+using System;
+using CvMatcher.Data;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace CvMatcher.Data.Migrations
+{
+    [DbContext(typeof(CvMatcherDbContext))]
+    [Migration("20260529111000_UpdateResultsUniqueConstraintToIncludeLanguage")]
+    partial class UpdateResultsUniqueConstraintToIncludeLanguage
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasDefaultSchema("cvMatcher")
+                .HasAnnotation("ProductVersion", "10.0.7")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("CvMatcher.Data.Entities.AiPromptEntity", b =>
+                {
+                    b.Property<string>("Key")
+                        .HasMaxLength(128)
+                        .HasColumnType("nvarchar(128)");
+
+                    b.Property<string>("Language")
+                        .HasMaxLength(8)
+                        .HasColumnType("nvarchar(8)");
+
+                    b.Property<string>("Description")
+                        .IsRequired()
+                        .ValueGeneratedOnAdd()
+                        .HasMaxLength(500)
+                        .HasColumnType("nvarchar(500)")
+                        .HasDefaultValue("");
+
+                    b.Property<DateTime>("UpdatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("datetime2")
+                        .HasDefaultValueSql("SYSUTCDATETIME()");
+
+                    b.Property<string>("Value")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.HasKey("Key", "Language");
+
+                    b.ToTable("AiPrompts", "cvMatcher");
+                });
+
+            modelBuilder.Entity("CvMatcher.Data.Entities.CvMatchResultEntity", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasMaxLength(64)
+                        .HasColumnType("nvarchar(64)");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("datetime2")
+                        .HasDefaultValueSql("SYSUTCDATETIME()");
+
+                    b.Property<string>("CvDocumentId")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("nvarchar(64)");
+
+                    b.Property<string>("JobDocumentId")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("nvarchar(64)");
+
+                    b.Property<string>("Language")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("ResultJson")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<int>("Score")
+                        .HasColumnType("int");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CvDocumentId", "JobDocumentId", "Language")
+                        .IsUnique();
+
+                    b.ToTable("Results", "cvMatcher");
+                });
+
+            modelBuilder.Entity("CvMatcher.Data.Entities.CvMatcherChatCacheEntity", b =>
+                {
+                    b.Property<string>("CacheKey")
+                        .HasMaxLength(64)
+                        .HasColumnType("nvarchar(64)");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("datetime2")
+                        .HasDefaultValueSql("SYSUTCDATETIME()");
+
+                    b.Property<string>("Model")
+                        .IsRequired()
+                        .HasMaxLength(120)
+                        .HasColumnType("nvarchar(120)");
+
+                    b.Property<string>("ResponseText")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<decimal>("Temperature")
+                        .HasColumnType("decimal(4,2)");
+
+                    b.HasKey("CacheKey");
+
+                    b.ToTable("ChatCache", "cvMatcher");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/Apis/cv-matcher-data/Migrations/20260529111000_UpdateResultsUniqueConstraintToIncludeLanguage.cs b/Apis/cv-matcher-data/Migrations/20260529111000_UpdateResultsUniqueConstraintToIncludeLanguage.cs
new file mode 100644
index 0000000..550b5bd
--- /dev/null
+++ b/Apis/cv-matcher-data/Migrations/20260529111000_UpdateResultsUniqueConstraintToIncludeLanguage.cs
@@ -0,0 +1,46 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace CvMatcher.Data.Migrations
+{
+    /// <inheritdoc />
+    public partial class UpdateResultsUniqueConstraintToIncludeLanguage : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            // The Language column was added in migration 20260524140335, but the unique constraint
+            // was never updated from (CvDocumentId, JobDocumentId) to include Language.
+            // This caused duplicate key violations when matching the same CV+Job in different languages.
+
+            migrationBuilder.DropIndex(
+                name: "IX_Results_CvDocumentId_JobDocumentId",
+                schema: MigrationConstants.SchemaName,
+                table: "Results");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Results_CvDocumentId_JobDocumentId_Language",
+                schema: MigrationConstants.SchemaName,
+                table: "Results",
+                columns: new[] { "CvDocumentId", "JobDocumentId", "Language" },
+                unique: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_Results_CvDocumentId_JobDocumentId_Language",
+                schema: MigrationConstants.SchemaName,
+                table: "Results");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Results_CvDocumentId_JobDocumentId",
+                schema: MigrationConstants.SchemaName,
+                table: "Results",
+                columns: new[] { "CvDocumentId", "JobDocumentId" },
+                unique: true);
+        }
+    }
+}
diff --git a/Apis/cv-matcher-data/Migrations/CvMatcherDbContextModelSnapshot.cs b/Apis/cv-matcher-data/Migrations/CvMatcherDbContextModelSnapshot.cs
index 33937c3..5e2fe70 100644
--- a/Apis/cv-matcher-data/Migrations/CvMatcherDbContextModelSnapshot.cs
+++ b/Apis/cv-matcher-data/Migrations/CvMatcherDbContextModelSnapshot.cs
@@ -88,7 +88,7 @@ namespace CvMatcher.Data.Migrations
 
                     b.HasKey("Id");
 
-                    b.HasIndex("CvDocumentId", "JobDocumentId")
+                    b.HasIndex("CvDocumentId", "JobDocumentId", "Language")
                         .IsUnique();
 
                     b.ToTable("Results", "cvMatcher");