diff --git a/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/ILocalizationDictionary.cs b/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/ILocalizationDictionary.cs
index e6879c0007..359ef6c553 100644
--- a/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/ILocalizationDictionary.cs
+++ b/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/ILocalizationDictionary.cs
@@ -13,4 +13,6 @@ public interface ILocalizationDictionary
     LocalizedString? GetOrNull(string name);
 
     void Fill(Dictionary<string, LocalizedString> dictionary);
+
+    void Merge(ILocalizationDictionary dictionary);
 }
diff --git a/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/Json/JsonLocalizationDictionaryBuilder.cs b/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/Json/JsonLocalizationDictionaryBuilder.cs
index f065f0e695..d39c06a1b4 100644
--- a/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/Json/JsonLocalizationDictionaryBuilder.cs
+++ b/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/Json/JsonLocalizationDictionaryBuilder.cs
@@ -60,7 +60,6 @@ public static class JsonLocalizationDictionaryBuilder
         }
 
         var dictionary = new Dictionary<string, LocalizedString>();
-        var dublicateNames = new List<string>();
 
         foreach (var item in FlattenTexts(jsonFile.Texts))
         {
@@ -68,20 +67,10 @@ public static class JsonLocalizationDictionaryBuilder
             {
                 throw new AbpException("The key is empty in given json string.");
             }
-            if (dictionary.GetOrDefault(item.Key) != null)
-            {
-                dublicateNames.Add(item.Key);
-            }
+            
             dictionary[item.Key] = new LocalizedString(item.Key, item.Value.NormalizeLineEndings());
         }
 
-        if (dublicateNames.Count > 0)
-        {
-            throw new AbpException(
-                "A dictionary can not contain same key twice. There are some duplicated names: " +
-                dublicateNames.JoinAsString(", "));
-        }
-
         return new StaticLocalizationDictionary(cultureCode, dictionary);
     }
 
diff --git a/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/StaticLocalizationDictionary.cs b/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/StaticLocalizationDictionary.cs
index b363076fe0..213627e1c6 100644
--- a/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/StaticLocalizationDictionary.cs
+++ b/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/StaticLocalizationDictionary.cs
@@ -1,3 +1,4 @@
+using System;
 using System.Collections.Generic;
 using Microsoft.Extensions.Localization;
 
@@ -37,4 +38,22 @@ public class StaticLocalizationDictionary : ILocalizationDictionary
             dictionary[item.Key] = item.Value;
         }
     }
+
+    public void Merge(ILocalizationDictionary dictionary)
+    {
+        if (dictionary is not StaticLocalizationDictionary staticLocalizationDictionary)
+        {
+            return; // do nothing, we have no idea what to do with such
+        }
+
+        foreach (var item in staticLocalizationDictionary.Dictionary)
+        {
+            if (string.IsNullOrEmpty(item.Key))
+            {
+                throw new AbpException("The key is empty in given json string.");
+            }
+
+            Dictionary[item.Key] = item.Value;
+        }
+    }
 }
diff --git a/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/VirtualFiles/VirtualFileLocalizationResourceContributorBase.cs b/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/VirtualFiles/VirtualFileLocalizationResourceContributorBase.cs
index d151dc78df..0c3b26aa60 100644
--- a/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/VirtualFiles/VirtualFileLocalizationResourceContributorBase.cs
+++ b/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/VirtualFiles/VirtualFileLocalizationResourceContributorBase.cs
@@ -104,12 +104,14 @@ public abstract class VirtualFileLocalizationResourceContributorBase : ILocaliza
                 continue;
             }
 
-            if (dictionaries.ContainsKey(dictionary.CultureName))
+            if (!dictionaries.ContainsKey(dictionary.CultureName))
             {
-                throw new AbpException($"{file.GetVirtualOrPhysicalPathOrNull()} dictionary has a culture name '{dictionary.CultureName}' which is already defined! Localization resource: {_resource.ResourceName}");
+                dictionaries[dictionary.CultureName] = dictionary;
+            }
+            else
+            {
+                dictionaries[dictionary.CultureName].Merge(dictionary);
             }
-
-            dictionaries[dictionary.CultureName] = dictionary;
         }
 
         return dictionaries;
diff --git a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/AbpLocalizationTestModule.cs b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/AbpLocalizationTestModule.cs
index 32835cb8f4..d4ef509fd5 100644
--- a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/AbpLocalizationTestModule.cs
+++ b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/AbpLocalizationTestModule.cs
@@ -29,6 +29,10 @@ public class AbpLocalizationTestModule : AbpModule
                 .Add("LocalizationTestCountryNames")
                 .AddVirtualJson("/Volo/Abp/Localization/TestResources/Base/CountryNames");
 
+            options.Resources
+                .Add("LocalizationTestFilesSplit")
+                .AddVirtualJson("/Volo/Abp/Localization/TestResources/FilesSplit");
+
             options.Resources
                 .Add<LocalizationTestResource>("en")
                 .AddVirtualJson("/Volo/Abp/Localization/TestResources/Source")
diff --git a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/AbpLocalization_Tests.cs b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/AbpLocalization_Tests.cs
index 189c1b8614..424cb8af34 100644
--- a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/AbpLocalization_Tests.cs
+++ b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/AbpLocalization_Tests.cs
@@ -234,6 +234,27 @@ public class AbpLocalization_Tests : AbpIntegratedTest<AbpLocalizationTestModule
         }
     }
 
+    [Fact]
+    public void Should_Get_Localized_Text_If_Defined_In_Requested_Culture_Defined_In_Different_Files()
+    {
+        using (CultureHelper.Use(CultureInfo.GetCultureInfo("de")))
+        {
+            _localizer["Car"].Value.ShouldBe("Auto");
+        }
+        using (CultureHelper.Use(CultureInfo.GetCultureInfo("de")))
+        {
+            _localizer["CarPlural"].Value.ShouldBe("Autos");
+        }
+        using (CultureHelper.Use(CultureInfo.GetCultureInfo("de")))
+        {
+            _localizer["Biography"].Value.ShouldBe("Biografie");
+        }
+        using (CultureHelper.Use(CultureInfo.GetCultureInfo("de")))
+        {
+            _localizer["Enum:BookType.Undefined"].Value.ShouldBe("Nicht definiert");
+        }
+    }
+
     [Fact]
     public void GetAllStrings_With_Parents()
     {
diff --git a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/AbpStringLocalizerFactory_Tests.cs b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/AbpStringLocalizerFactory_Tests.cs
index dbc007ac02..f9eb25a552 100644
--- a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/AbpStringLocalizerFactory_Tests.cs
+++ b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/AbpStringLocalizerFactory_Tests.cs
@@ -90,4 +90,17 @@ public class AbpStringLocalizerFactory_Tests : AbpIntegratedTest<AbpLocalization
             localizer2["CarPlural"].Value.ShouldBe("CarPlural");
         }
     }
+
+    [Fact]
+    public async Task Should_Create_Resource_By_Name_FromSplitFiles()
+    {
+        using (CultureHelper.Use("en"))
+        {
+            var localizer = _factory.CreateByResourceNameOrNull("LocalizationTestFilesSplit");
+            localizer.ShouldNotBeNull();
+            localizer["Base.Id"].Value.ShouldBe("Id");
+            localizer["Book.Id"].Value.ShouldBe("ISBN");
+            localizer["ThisIsRequiredValue"].Value.ShouldBe("This is required value (this will be used)");
+        }
+    }
 }
\ No newline at end of file
diff --git a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/JsonLocalizationDictionaryBuilder_Tests.cs b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/JsonLocalizationDictionaryBuilder_Tests.cs
new file mode 100644
index 0000000000..93526b2aa4
--- /dev/null
+++ b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/JsonLocalizationDictionaryBuilder_Tests.cs
@@ -0,0 +1,47 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using NSubstitute.ExceptionExtensions;
+using Shouldly;
+using Volo.Abp.Localization.Json;
+using Volo.Abp.Testing;
+using Xunit;
+
+namespace Volo.Abp.Localization;
+
+/// <summary>
+/// Testing edge cases for <see cref="JsonLocalizationDictionaryBuilder"/>
+/// </summary>
+public class JsonLocalizationDictionaryBuilder_Tests : AbpIntegratedTest<AbpLocalizationTestModule>
+{
+    [Fact]
+    public void JsonLocalizationDictionaryBuilder_Should_Handle_Duplicates()
+    {
+        var localizationDictionary = JsonLocalizationDictionaryBuilder
+            .BuildFromJsonString("{\r\n  \"culture\": \"en\",\r\n  \"texts\": {\r\n    \"ThisFieldIsRequired\": \"This field is required\",\r\n    \"MaxLenghtErrorMessage\": \"This field can be maximum of '{0}' chars\",\r\n    \"Enum:BookType.Undefined\": \"Undefined from ValidationResource\",\r\n    \"Enum:BookType.0\": \"Undefined with value 0 from ValidationResource\",\r\n    \"BookType.Adventure\": \"Adventure from ValidationResource\",\r\n    \"BookType.1\": \"Adventure with value 1 from ValidationResource\",\r\n    \"Biography\": \"Biography from ValidationResource\",\r\n    \"ThisFieldIsRequired\": \"This field is required again\"\r\n  }\r\n}");
+
+        var localizationString = localizationDictionary.GetOrNull("ThisFieldIsRequired");
+        localizationString.ShouldNotBeNull();
+
+        localizationString.Value.ShouldBe("This field is required again");
+    }
+
+    [Fact]
+    public void JsonLocalizationDictionaryBuilder_Should_Handle_Deep_Duplicates()
+    {
+        var input = @"{
+""culture"": ""en"",
+""texts"": {
+    ""ThisFieldIsRequired"": ""This field is required"",
+    ""DeepLocaliaztionKey"": {""DeepKey"": ""DeepValue""},
+    ""DeepLocaliaztionKey__DeepKey"": ""Another translation""
+}
+}";
+
+        var localizationDictionary = JsonLocalizationDictionaryBuilder.BuildFromJsonString(input);
+        localizationDictionary.ShouldNotBeNull();
+        var localizationString = localizationDictionary.GetOrNull("DeepLocaliaztionKey__DeepKey");
+        localizationString.ShouldNotBeNull();
+        localizationString.Value.ShouldBe("Another translation");
+    }
+}
diff --git a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/FilesSplit/!en_First.json b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/FilesSplit/!en_First.json
new file mode 100644
index 0000000000..681c77b5d5
--- /dev/null
+++ b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/FilesSplit/!en_First.json
@@ -0,0 +1,6 @@
+{
+  "culture": "en",
+  "texts": {
+    "ThisIsRequiredValue": "This is required value"
+  }
+}
diff --git a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/FilesSplit/en_Base.json b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/FilesSplit/en_Base.json
new file mode 100644
index 0000000000..1bcfead01b
--- /dev/null
+++ b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/FilesSplit/en_Base.json
@@ -0,0 +1,7 @@
+{
+  "culture": "en",
+  "texts": {
+    "Base.Id": "Id",
+    "Base.Name": "Name"
+  }
+}
diff --git a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/FilesSplit/en_Book.json b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/FilesSplit/en_Book.json
new file mode 100644
index 0000000000..22d6039843
--- /dev/null
+++ b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/FilesSplit/en_Book.json
@@ -0,0 +1,7 @@
+{
+  "culture": "en",
+  "texts": {
+    "Book.Id": "ISBN",
+    "Book.Name": "Title"
+  }
+}
diff --git a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/FilesSplit/zen_Last.json b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/FilesSplit/zen_Last.json
new file mode 100644
index 0000000000..a94dc23006
--- /dev/null
+++ b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/FilesSplit/zen_Last.json
@@ -0,0 +1,6 @@
+{
+  "culture": "en",
+  "texts": {
+    "ThisIsRequiredValue": "This is required value (this will be used)"
+  }
+}
diff --git a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Source/de.json b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Source/de.json
index ee396f1341..4ef1655764 100644
--- a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Source/de.json
+++ b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Source/de.json
@@ -6,11 +6,6 @@
     "CarPlural": "Autos",
     "MaxLenghtErrorMessage": "Die Länge dieses Feldes kann maximal '{0}'-Zeichen betragen",
     "Universe": "Universum",
-    "FortyTwo": "Zweiundvierzig",
-    "Enum:BookType.Undefined": "Nicht definiert",
-    "Enum:BookType.0": "Undefiniert mit Wert 0",
-    "BookType.Adventure": "Abenteuer",
-    "BookType.1": "Abenteuer mit Wert 1",
-    "Biography": "Biografie"
+    "FortyTwo": "Zweiundvierzig"
   }
 }
\ No newline at end of file
diff --git a/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Source/de_Book.json b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Source/de_Book.json
new file mode 100644
index 0000000000..1847c4e4fb
--- /dev/null
+++ b/framework/test/Volo.Abp.Localization.Tests/Volo/Abp/Localization/TestResources/Source/de_Book.json
@@ -0,0 +1,10 @@
+{
+  "culture": "de",
+  "texts": {
+    "Enum:BookType.Undefined": "Nicht definiert",
+    "Enum:BookType.0": "Undefiniert mit Wert 0",
+    "BookType.Adventure": "Abenteuer",
+    "BookType.1": "Abenteuer mit Wert 1",
+    "Biography": "Biografie"
+  }
+}
\ No newline at end of file