diff --git a/docs/en/Text-Templating.md b/docs/en/Text-Templating.md
index c71787f598..3008db5c41 100644
--- a/docs/en/Text-Templating.md
+++ b/docs/en/Text-Templating.md
@@ -4,7 +4,7 @@
 
 ABP Framework provides a simple, yet efficient text template system. Text templating is used to dynamically render contents based on a template and a model (a data object):
 
-***TEMPLATE + MODEL ==render==> RENDERED CONTENT***
+Template + Model =renderer=> Rendered Content
 
 It is very similar to an ASP.NET Core Razor View (or Page):
 
@@ -454,4 +454,4 @@ Return `null` if your source can not find the content, so `ITemplateContentProvi
 
 * [The source code of the sample application](https://github.com/abpframework/abp-samples/tree/master/TextTemplateDemo) developed and referred through this document.
 * [Localization system](Localization.md).
-* [Virtual File System](Virtual-File-System.md).
\ No newline at end of file
+* [Virtual File System](Virtual-File-System.md).
diff --git a/docs/en/UI/Angular/Localization.md b/docs/en/UI/Angular/Localization.md
index 78822a16de..1ee68ace82 100644
--- a/docs/en/UI/Angular/Localization.md
+++ b/docs/en/UI/Angular/Localization.md
@@ -193,6 +193,32 @@ import { Component } from '@angular/core';
 export class AppComponent {}
 ```
 
+## Mapping of Culture Name to Angular Locale File Name
+
+Some of the culture names defined in .NET do not match Angular locales. In such cases, the Angular app throws an error like below at runtime:
+
+![locale-error](./images/locale-error.png)
+
+If you see an error like this, you should pass the `cultureNameToLocaleFileNameMapping` property like below to CoreModule's forRoot static method.
+
+```js
+// app.module.ts
+
+@NgModule({
+  imports: [
+    // other imports
+     CoreModule.forRoot({
+      // other options
+      cultureNameToLocaleFileNameMapping: { 
+        "DotnetCultureName": "AngularLocaleFileName",
+        "pt-BR": "pt"  // example
+      }
+    })
+    //...
+```
+
+See [all locale files in Angular](https://github.com/angular/angular/tree/master/packages/common/locales).
+
 
 ## See Also
 
@@ -200,4 +226,4 @@ export class AppComponent {}
 
 ## What's Next?
 
-* [Permission Management](./Permission-Management.md)
\ No newline at end of file
+* [Permission Management](./Permission-Management.md)
diff --git a/docs/en/UI/Angular/images/locale-error.png b/docs/en/UI/Angular/images/locale-error.png
new file mode 100644
index 0000000000..de385a59c0
Binary files /dev/null and b/docs/en/UI/Angular/images/locale-error.png differ
diff --git a/npm/ng-packs/packages/core/src/lib/core.module.ts b/npm/ng-packs/packages/core/src/lib/core.module.ts
index f118ab2836..3fd29fec53 100644
--- a/npm/ng-packs/packages/core/src/lib/core.module.ts
+++ b/npm/ng-packs/packages/core/src/lib/core.module.ts
@@ -34,7 +34,7 @@ import { ConfigState } from './states/config.state';
 import { ProfileState } from './states/profile.state';
 import { ReplaceableComponentsState } from './states/replaceable-components.state';
 import { SessionState } from './states/session.state';
-import { CORE_OPTIONS } from './tokens/options.token';
+import { CORE_OPTIONS, coreOptionsFactory } from './tokens/options.token';
 import { noop } from './utils/common-utils';
 import './utils/date-extensions';
 import { getInitialData, localeInitializer, configureOAuth } from './utils/initial-utils';
@@ -171,9 +171,14 @@ export class CoreModule {
           useValue: { environment: options.environment },
         },
         {
-          provide: CORE_OPTIONS,
+          provide: 'CORE_OPTIONS',
           useValue: options,
         },
+        {
+          provide: CORE_OPTIONS,
+          useFactory: coreOptionsFactory,
+          deps: ['CORE_OPTIONS'],
+        },
         {
           provide: HTTP_INTERCEPTORS,
           useClass: ApiInterceptor,
diff --git a/npm/ng-packs/packages/core/src/lib/models/common.ts b/npm/ng-packs/packages/core/src/lib/models/common.ts
index 930265020c..aa2f961b7b 100644
--- a/npm/ng-packs/packages/core/src/lib/models/common.ts
+++ b/npm/ng-packs/packages/core/src/lib/models/common.ts
@@ -9,6 +9,7 @@ export namespace ABP {
     environment: Partial<Config.Environment>;
     skipGetAppConfiguration?: boolean;
     sendNullsAsQueryParam?: boolean;
+    cultureNameToLocaleFileNameMapping?: Dictionary<string>;
   }
 
   export interface Test {
diff --git a/npm/ng-packs/packages/core/src/lib/services/localization.service.ts b/npm/ng-packs/packages/core/src/lib/services/localization.service.ts
index 3f89642fd9..e488bafaf4 100644
--- a/npm/ng-packs/packages/core/src/lib/services/localization.service.ts
+++ b/npm/ng-packs/packages/core/src/lib/services/localization.service.ts
@@ -8,6 +8,7 @@ import { Config } from '../models/config';
 import { ConfigState } from '../states/config.state';
 import { registerLocale } from '../utils/initial-utils';
 import { createLocalizer, createLocalizerWithFallback } from '../utils/localization-utils';
+import { CORE_OPTIONS } from '../tokens/options.token';
 
 type ShouldReuseRoute = (future: ActivatedRouteSnapshot, curr: ActivatedRouteSnapshot) => boolean;
 
@@ -44,11 +45,12 @@ export class LocalizationService {
 
   registerLocale(locale: string) {
     const router = this.injector.get(Router);
+    const { cultureNameToLocaleFileNameMapping: localeNameMap } = this.injector.get(CORE_OPTIONS);
     const { shouldReuseRoute } = router.routeReuseStrategy;
     router.routeReuseStrategy.shouldReuseRoute = () => false;
     router.navigated = false;
 
-    return registerLocale(locale).then(() => {
+    return registerLocale(locale, localeNameMap).then(() => {
       this.ngZone.run(async () => {
         await router.navigateByUrl(router.url).catch(noop);
         router.routeReuseStrategy.shouldReuseRoute = shouldReuseRoute;
diff --git a/npm/ng-packs/packages/core/src/lib/tokens/options.token.ts b/npm/ng-packs/packages/core/src/lib/tokens/options.token.ts
index 2c4dffe9dc..a4b05c8cc7 100644
--- a/npm/ng-packs/packages/core/src/lib/tokens/options.token.ts
+++ b/npm/ng-packs/packages/core/src/lib/tokens/options.token.ts
@@ -1,4 +1,15 @@
 import { InjectionToken } from '@angular/core';
 import { ABP } from '../models/common';
+import differentLocales from '../constants/different-locales';
 
 export const CORE_OPTIONS = new InjectionToken<ABP.Root>('CORE_OPTIONS');
+
+export function coreOptionsFactory({
+  cultureNameToLocaleFileNameMapping: localeNameMap = {},
+  ...options
+}: ABP.Root) {
+  return {
+    ...options,
+    cultureNameToLocaleFileNameMapping: { ...differentLocales, ...localeNameMap },
+  } as ABP.Root;
+}
diff --git a/npm/ng-packs/packages/core/src/lib/utils/initial-utils.ts b/npm/ng-packs/packages/core/src/lib/utils/initial-utils.ts
index bfca50bcd2..78677b7ca4 100644
--- a/npm/ng-packs/packages/core/src/lib/utils/initial-utils.ts
+++ b/npm/ng-packs/packages/core/src/lib/utils/initial-utils.ts
@@ -4,7 +4,6 @@ import { Store } from '@ngxs/store';
 import { OAuthService } from 'angular-oauth2-oidc';
 import { tap } from 'rxjs/operators';
 import { GetAppConfiguration } from '../actions/config.actions';
-import differentLocales from '../constants/different-locales';
 import { ABP } from '../models/common';
 import { ConfigState } from '../states/config.state';
 import { CORE_OPTIONS } from '../tokens/options.token';
@@ -45,22 +44,25 @@ function checkAccessToken(store: Store, injector: Injector) {
 export function localeInitializer(injector: Injector) {
   const fn = () => {
     const store: Store = injector.get(Store);
+    const options = injector.get(CORE_OPTIONS);
 
     const lang = store.selectSnapshot(state => state.SessionState.language) || 'en';
 
     return new Promise((resolve, reject) => {
-      registerLocale(lang).then(() => resolve('resolved'), reject);
+      registerLocale(lang, options.cultureNameToLocaleFileNameMapping).then(
+        () => resolve('resolved'),
+        reject,
+      );
     });
   };
 
   return fn;
 }
 
-export function registerLocale(locale: string) {
+export function registerLocale(locale: string, localeNameMap: ABP.Dictionary<string>) {
   return import(
-    /* webpackInclude: /(af|ar|am|ar-SA|as|az-Latn|be|bg|bn-BD|bn-IN|bs|ca|ca-ES-VALENCIA|cs|cy|da|de|de|el|en-GB|en|es|en|es-US|es-MX|et|eu|fa|fi|en|fr|fr|fr-CA|ga|gd|gl|gu|ha|he|hi|hr|hu|hy|id|ig|is|it|it|ja|ka|kk|km|kn|ko|kok|en|en|lb|lt|lv|en|mk|ml|mn|mr|ms|mt|nb|ne|nl|nl-BE|nn|en|or|pa|pa-Arab|pl|en|pt|pt-PT|en|en|ro|ru|rw|pa-Arab|si|sk|sl|sq|sr-Cyrl-BA|sr-Cyrl|sr-Latn|sv|sw|ta|te|tg|th|ti|tk|tn|tr|tt|ug|uk|ur|uz-Latn|vi|wo|xh|yo|zh-Hans|zh-Hant|zu)\.js$/ */
-    /* webpackChunkName: "[request]"*/
-    `@angular/common/locales/${differentLocales[locale] || locale}.js`
+    /* webpackChunkName: "_locale-[request]"*/
+    `@angular/common/locales/${localeNameMap[locale] || locale}.js`
   ).then(module => {
     registerLocaleData(module.default);
   });
diff --git a/npm/ng-packs/packages/theme-basic/src/lib/theme-basic.module.ts b/npm/ng-packs/packages/theme-basic/src/lib/theme-basic.module.ts
index f599124e83..bfacbcf9a7 100644
--- a/npm/ng-packs/packages/theme-basic/src/lib/theme-basic.module.ts
+++ b/npm/ng-packs/packages/theme-basic/src/lib/theme-basic.module.ts
@@ -42,6 +42,20 @@ export const LAYOUTS = [ApplicationLayoutComponent, AccountLayoutComponent, Empt
     NgbCollapseModule,
     NgbDropdownModule,
     NgxValidateCoreModule,
+  ],
+  entryComponents: [...LAYOUTS, ValidationErrorComponent, CurrentUserComponent, LanguagesComponent],
+})
+export class ThemeBasicModule {
+  static forRoot(): ModuleWithProviders<ThemeBasicModule> {
+    return {
+      ngModule: RootThemeBasicModule,
+      providers: [BASIC_THEME_NAV_ITEM_PROVIDERS, BASIC_THEME_STYLES_PROVIDERS],
+    };
+  }
+}
+
+@NgModule({
+  imports: [
     NgxValidateCoreModule.forRoot({
       targetSelector: '.form-group',
       blueprints: {
@@ -63,13 +77,5 @@ export const LAYOUTS = [ApplicationLayoutComponent, AccountLayoutComponent, Empt
       errorTemplate: ValidationErrorComponent,
     }),
   ],
-  entryComponents: [...LAYOUTS, ValidationErrorComponent, CurrentUserComponent, LanguagesComponent],
 })
-export class ThemeBasicModule {
-  static forRoot(): ModuleWithProviders<ThemeBasicModule> {
-    return {
-      ngModule: ThemeBasicModule,
-      providers: [BASIC_THEME_NAV_ITEM_PROVIDERS, BASIC_THEME_STYLES_PROVIDERS],
-    };
-  }
-}
+export class RootThemeBasicModule {}