diff --git a/npm/ng-packs/packages/core/src/lib/proxy/volo/abp/asp-net-core/mvc/application-configurations/models.ts b/npm/ng-packs/packages/core/src/lib/proxy/volo/abp/asp-net-core/mvc/application-configurations/models.ts
index 524c9a8c78..b2d7b67bea 100644
--- a/npm/ng-packs/packages/core/src/lib/proxy/volo/abp/asp-net-core/mvc/application-configurations/models.ts
+++ b/npm/ng-packs/packages/core/src/lib/proxy/volo/abp/asp-net-core/mvc/application-configurations/models.ts
@@ -42,6 +42,7 @@ export interface ApplicationLocalizationConfigurationDto {
   defaultResourceName?: string;
   languagesMap: Record<string, NameValue[]>;
   languageFilesMap: Record<string, NameValue[]>;
+  useRouteBasedCulture: boolean;
 }
 
 export interface ApplicationLocalizationDto {
diff --git a/npm/ng-packs/packages/core/src/lib/services/index.ts b/npm/ng-packs/packages/core/src/lib/services/index.ts
index 205fd2f0dc..cccac2ffb6 100644
--- a/npm/ng-packs/packages/core/src/lib/services/index.ts
+++ b/npm/ng-packs/packages/core/src/lib/services/index.ts
@@ -16,6 +16,8 @@ export * from './resource-wait.service';
 export * from './rest.service';
 export * from './router-events.service';
 export * from './router-wait.service';
+export * from './route-based-culture.service';
+export * from './route-based-culture-url.service';
 export * from './routes.service';
 export * from './session-state.service';
 export * from './subscription.service';
diff --git a/npm/ng-packs/packages/core/src/lib/services/route-based-culture-url.service.ts b/npm/ng-packs/packages/core/src/lib/services/route-based-culture-url.service.ts
new file mode 100644
index 0000000000..cbd94f3803
--- /dev/null
+++ b/npm/ng-packs/packages/core/src/lib/services/route-based-culture-url.service.ts
@@ -0,0 +1,170 @@
+import { Location } from '@angular/common';
+import { isPlatformBrowser } from '@angular/common';
+import { Injectable, PLATFORM_ID, inject } from '@angular/core';
+import { Router } from '@angular/router';
+import { LanguageInfo } from '../proxy/volo/abp/localization/models';
+import {
+  findMatchingCultureName,
+  getFirstPathSegment,
+  stripCultureSegmentFromPath,
+} from '../utils/route-based-culture.utils';
+import { getRoutePath } from '../utils/route-utils';
+import { ConfigStateService } from './config-state.service';
+import { SessionStateService } from './session-state.service';
+
+/**
+ * URL helpers for route-based culture: prefix menu links, strip culture for route matching,
+ * and navigate when the user picks a language so the URL stays in sync with the session.
+ */
+@Injectable({
+  providedIn: 'root',
+})
+export class RouteBasedCultureUrlService {
+  private readonly router = inject(Router);
+  private readonly location = inject(Location);
+  private readonly configState = inject(ConfigStateService);
+  private readonly sessionState = inject(SessionStateService);
+  private readonly platformId = inject(PLATFORM_ID);
+
+  /** Cached from localization config; refreshed when application configuration updates. */
+  private useRouteBasedCulture = false;
+  private languages: LanguageInfo[] | undefined;
+
+  constructor() {
+    this.refreshRouteCultureCache();
+    this.configState.getAll$().subscribe(() => this.refreshRouteCultureCache());
+  }
+
+  private refreshRouteCultureCache(): void {
+    const loc = this.configState.getOne('localization');
+    if (!loc) {
+      this.useRouteBasedCulture = false;
+      this.languages = undefined;
+      return;
+    }
+    this.useRouteBasedCulture = !!loc.useRouteBasedCulture;
+    this.languages = loc.languages as LanguageInfo[] | undefined;
+  }
+
+  private isRouteBasedCultureEnabled(): boolean {
+    return this.useRouteBasedCulture;
+  }
+
+  /**
+   * Same as {@link getRoutePath} but removes the leading culture segment when route-based culture is enabled,
+   * so paths match `RoutesService` entries (e.g. `/identity/users`).
+   */
+  getRoutePathForMatching(router: Router, url = router.url): string {
+    const raw = getRoutePath(router, url);
+    return this.stripCulturePrefixIfEnabled(raw);
+  }
+
+  /**
+   * Strips the leading culture segment when it matches a configured language and route-based culture is enabled.
+   * Use for menu active state, breadcrumbs, and any comparison between `router.url` and `RoutesService` paths.
+   */
+  stripCulturePrefixIfEnabled(path: string): string {
+    if (!this.isRouteBasedCultureEnabled() || !path) {
+      return path;
+    }
+    return this.stripCulturePrefix(path);
+  }
+
+  /**
+   * Alias for {@link stripCulturePrefixIfEnabled}: normalizes the current URL for **menu highlighting**
+   * when menu `link` values omit the culture segment (e.g. Lepton `NavbarRoutesComponent`, `NavbarService.getRouteItem`).
+   */
+  normalizeForMenuMatch(path: string): string {
+    return this.stripCulturePrefixIfEnabled(path);
+  }
+
+  /**
+   * Removes the first segment when it is a known UI culture (for matching and normalization).
+   */
+  stripCulturePrefix(path: string): string {
+    return stripCultureSegmentFromPath(path, this.languages);
+  }
+
+  /**
+   * Prefixes an app path with the current session culture when route-based culture is enabled
+   * (e.g. `/identity/users` → `/en/identity/users`). Use for `routerLink`, `navigateByUrl`, etc.
+   */
+  prefixPathWithCulture(path: string | undefined | null): string | undefined | null {
+    if (path == null || path === '') {
+      return path;
+    }
+
+    if (!this.isRouteBasedCultureEnabled()) {
+      return path;
+    }
+
+    if (/^https?:\/\//i.test(path)) {
+      return path;
+    }
+
+    const lang = this.sessionState.getLanguage();
+    if (!lang) {
+      return path;
+    }
+
+    const stripped = this.stripCulturePrefix(path);
+    const normalized = stripped.startsWith('/') ? stripped : '/' + stripped;
+    const suffix = normalized === '/' ? '' : normalized;
+    return `/${lang}${suffix}`;
+  }
+
+  /**
+   * Rewrites the current URL so the first segment is {@link cultureName} (or prepends it).
+   * Call this when the user selects a language in the UI instead of only {@link SessionStateService.setLanguage}
+   * so the address bar stays aligned with the session.
+   */
+  navigateToUrlWithCulture(cultureName: string): Promise<boolean> | void {
+    if (!cultureName || !isPlatformBrowser(this.platformId)) {
+      return Promise.resolve(false);
+    }
+
+    if (!this.isRouteBasedCultureEnabled()) {
+      this.sessionState.setLanguage(cultureName);
+      return Promise.resolve(true);
+    }
+
+    const path = this.location.path();
+    const newPath = this.rewritePathToCulture(path, cultureName);
+    return this.router.navigateByUrl(newPath);
+  }
+
+  /**
+   * Preferred entry point for language pickers (e.g. Lepton toolbar): same as {@link navigateToUrlWithCulture}.
+   */
+  applyLanguageSelection(cultureName: string): Promise<boolean> | void {
+    return this.navigateToUrlWithCulture(cultureName);
+  }
+
+  /**
+   * Builds a new path (including query/hash) with the given culture as the first segment,
+   * replacing the culture segment when one is already present.
+   */
+  rewritePathToCulture(urlPath: string, newCulture: string): string {
+    const languages = this.languages;
+    const pathEnd = urlPath.search(/[?#]/);
+    const pathOnly = pathEnd >= 0 ? urlPath.slice(0, pathEnd) : urlPath;
+    const suffix = pathEnd >= 0 ? urlPath.slice(pathEnd) : '';
+
+    const first = getFirstPathSegment(pathOnly);
+    const firstIsCulture = !!findMatchingCultureName(first, languages);
+
+    if (firstIsCulture) {
+      const segments = pathOnly.split('/').filter(s => s.length > 0);
+      if (segments.length === 0) {
+        return `/${newCulture}${suffix}`;
+      }
+      segments[0] = newCulture;
+      const joined = '/' + segments.join('/');
+      return joined + suffix;
+    }
+
+    const normalized = pathOnly.startsWith('/') ? pathOnly : '/' + pathOnly;
+    const rest = normalized === '/' ? '' : normalized;
+    return `/${newCulture}${rest}${suffix}`;
+  }
+}
diff --git a/npm/ng-packs/packages/core/src/lib/services/route-based-culture.service.ts b/npm/ng-packs/packages/core/src/lib/services/route-based-culture.service.ts
new file mode 100644
index 0000000000..f78b6130a9
--- /dev/null
+++ b/npm/ng-packs/packages/core/src/lib/services/route-based-culture.service.ts
@@ -0,0 +1,59 @@
+import { isPlatformBrowser } from '@angular/common';
+import { Injectable, PLATFORM_ID, inject } from '@angular/core';
+import { NavigationEnd, Router } from '@angular/router';
+import { filter } from 'rxjs/operators';
+import { LanguageInfo } from '../proxy/volo/abp/localization/models';
+import { findMatchingCultureName, getFirstPathSegment } from '../utils/route-based-culture.utils';
+import { ConfigStateService } from './config-state.service';
+import { SessionStateService } from './session-state.service';
+
+/**
+ * When the backend enables URL-based localization (`localization.useRouteBasedCulture` from application configuration),
+ * keeps session language in sync with the first URL path segment (e.g. /en/..., /tr-TR/...).
+ * Works with nested routes because only the leading segment is interpreted as culture.
+ */
+@Injectable({
+  providedIn: 'root',
+})
+export class RouteBasedCultureService {
+  private readonly router = inject(Router);
+  private readonly configState = inject(ConfigStateService);
+  private readonly sessionState = inject(SessionStateService);
+  private readonly platformId = inject(PLATFORM_ID);
+  protected readonly localization = this.configState.getOne('localization');
+
+  constructor() {
+    if (!isPlatformBrowser(this.platformId)) {
+      return;
+    }
+
+    if (!this.localization?.useRouteBasedCulture) {
+      return;
+    }
+
+    this.router.events
+      .pipe(filter((e): e is NavigationEnd => e instanceof NavigationEnd))
+      .subscribe(() => this.syncLanguageFromUrl());
+  }
+
+  /**
+   * Reads the culture from the current URL and updates session language when it matches a configured language.
+   * @param pathOverride Optional path (e.g. from `Location.path()` during app bootstrap before navigation settles).
+   */
+  syncLanguageFromUrl(pathOverride?: string): void {
+    if (!isPlatformBrowser(this.platformId)) {
+      return;
+    }
+
+    const languages = this.localization?.languages as LanguageInfo[] | undefined;
+    const path = pathOverride ?? this.router.url;
+    const firstSegment = getFirstPathSegment(path);
+    const cultureName = findMatchingCultureName(firstSegment, languages);
+
+    if (!cultureName) {
+      return;
+    }
+
+    this.sessionState.setLanguage(cultureName);
+  }
+}
diff --git a/npm/ng-packs/packages/core/src/lib/services/title-strategy.service.ts b/npm/ng-packs/packages/core/src/lib/services/title-strategy.service.ts
index af961794f8..18d83290b1 100644
--- a/npm/ng-packs/packages/core/src/lib/services/title-strategy.service.ts
+++ b/npm/ng-packs/packages/core/src/lib/services/title-strategy.service.ts
@@ -27,6 +27,10 @@ export class AbpTitleStrategy extends TitleStrategy {
 
   override updateTitle(routerState: RouterStateSnapshot) {
     this.routerState = routerState;
+    if (!routerState?.root) {
+      return;
+    }
+
     const title = this.buildTitle(routerState);
 
     const projectName = this.localizationService.instant({
diff --git a/npm/ng-packs/packages/core/src/lib/tests/route-based-culture-url.service.spec.ts b/npm/ng-packs/packages/core/src/lib/tests/route-based-culture-url.service.spec.ts
new file mode 100644
index 0000000000..eaaf94df1b
--- /dev/null
+++ b/npm/ng-packs/packages/core/src/lib/tests/route-based-culture-url.service.spec.ts
@@ -0,0 +1,81 @@
+import { Location } from '@angular/common';
+import { TestBed } from '@angular/core/testing';
+import { Router } from '@angular/router';
+import { of } from 'rxjs';
+import { ConfigStateService } from '../services/config-state.service';
+import { RouteBasedCultureUrlService } from '../services/route-based-culture-url.service';
+import { SessionStateService } from '../services/session-state.service';
+
+const languages = [
+  { cultureName: 'en', displayName: 'English' },
+  { cultureName: 'tr', displayName: 'Turkish' },
+];
+
+describe('RouteBasedCultureUrlService', () => {
+  let service: RouteBasedCultureUrlService;
+  let configState: { getOne: ReturnType<typeof vi.fn> };
+  let sessionState: {
+    getLanguage: ReturnType<typeof vi.fn>;
+    setLanguage: ReturnType<typeof vi.fn>;
+  };
+
+  function setup(useRouteBasedCulture: boolean) {
+    configState = {
+      getOne: vi.fn((key: string) => {
+        if (key === 'localization') {
+          return { useRouteBasedCulture, languages };
+        }
+        return undefined;
+      }),
+      getAll$: () => of({}),
+    };
+    sessionState = {
+      getLanguage: vi.fn(() => 'tr'),
+      setLanguage: vi.fn(),
+    };
+
+    TestBed.configureTestingModule({
+      providers: [
+        RouteBasedCultureUrlService,
+        { provide: ConfigStateService, useValue: configState },
+        { provide: SessionStateService, useValue: sessionState },
+        {
+          provide: Router,
+          useValue: { navigateByUrl: vi.fn(() => Promise.resolve(true)), url: '/tr' },
+        },
+        { provide: Location, useValue: { path: () => '/tr/home' } },
+      ],
+    });
+
+    service = TestBed.inject(RouteBasedCultureUrlService);
+  }
+
+  afterEach(() => {
+    TestBed.resetTestingModule();
+  });
+
+  test('prefixPathWithCulture leaves path unchanged when useRouteBasedCulture is false', () => {
+    setup(false);
+    expect(service.prefixPathWithCulture('/identity/users')).toBe('/identity/users');
+  });
+
+  test('prefixPathWithCulture prepends session culture when enabled', () => {
+    setup(true);
+    expect(service.prefixPathWithCulture('/identity/users')).toBe('/tr/identity/users');
+  });
+
+  test('stripCulturePrefixIfEnabled removes leading culture segment', () => {
+    setup(true);
+    expect(service.stripCulturePrefixIfEnabled('/en/identity/users')).toBe('/identity/users');
+  });
+
+  test('rewritePathToCulture replaces existing culture segment', () => {
+    setup(true);
+    expect(service.rewritePathToCulture('/en/home?x=1', 'tr')).toBe('/tr/home?x=1');
+  });
+
+  test('rewritePathToCulture prepends culture when missing', () => {
+    setup(true);
+    expect(service.rewritePathToCulture('/identity/users', 'tr')).toBe('/tr/identity/users');
+  });
+});
diff --git a/npm/ng-packs/packages/core/src/lib/tests/route-based-culture.utils.spec.ts b/npm/ng-packs/packages/core/src/lib/tests/route-based-culture.utils.spec.ts
new file mode 100644
index 0000000000..e9e2ea9b96
--- /dev/null
+++ b/npm/ng-packs/packages/core/src/lib/tests/route-based-culture.utils.spec.ts
@@ -0,0 +1,81 @@
+import {
+  findMatchingCultureName,
+  getFirstPathSegment,
+  normalizeUrlForRouteCultureMatch,
+  stripCultureSegmentFromPath,
+} from '../utils/route-based-culture.utils';
+import type { LanguageInfo } from '../proxy/volo/abp/localization/models';
+
+describe('route-based-culture.utils', () => {
+  describe('#getFirstPathSegment', () => {
+    test.each`
+      urlPath                      | expected
+      ${''}                        | ${''}
+      ${'/'}                       | ${''}
+      ${'/en'}                     | ${'en'}
+      ${'/en/account'}             | ${'en'}
+      ${'en/account'}              | ${'en'}
+      ${'/tr-TR/foo/bar'}          | ${'tr-TR'}
+      ${'/zh-Hans/account?x=1'}    | ${'zh-Hans'}
+      ${'tr/home#frag'}            | ${'tr'}
+    `('should return $expected when urlPath is $urlPath', ({ urlPath, expected }) => {
+      expect(getFirstPathSegment(urlPath)).toBe(expected);
+    });
+  });
+
+  describe('#findMatchingCultureName', () => {
+    const languages: LanguageInfo[] = [
+      { cultureName: 'en' },
+      { cultureName: 'tr-TR' },
+      { cultureName: 'zh-Hans' },
+    ];
+
+    test.each`
+      segment      | expected
+      ${'en'}      | ${'en'}
+      ${'EN'}      | ${'en'}
+      ${'tr-tr'}   | ${'tr-TR'}
+      ${'zh-hans'} | ${'zh-Hans'}
+      ${'account'} | ${undefined}
+      ${''}        | ${undefined}
+    `('should return $expected when segment is $segment', ({ segment, expected }) => {
+      expect(findMatchingCultureName(segment, languages)).toBe(expected);
+    });
+
+    test('should return undefined when languages is empty', () => {
+      expect(findMatchingCultureName('en', [])).toBeUndefined();
+    });
+  });
+
+  describe('#stripCultureSegmentFromPath', () => {
+    const languages: LanguageInfo[] = [{ cultureName: 'en' }, { cultureName: 'tr' }];
+
+    test('should strip leading culture segment for menu matching', () => {
+      expect(stripCultureSegmentFromPath('/en/identity/users', languages)).toBe('/identity/users');
+    });
+
+    test('should leave path unchanged when first segment is not a culture', () => {
+      expect(stripCultureSegmentFromPath('/identity/users', languages)).toBe('/identity/users');
+    });
+
+    test('should preserve query string', () => {
+      expect(stripCultureSegmentFromPath('/en/home?x=1', languages)).toBe('/home?x=1');
+    });
+  });
+
+  describe('#normalizeUrlForRouteCultureMatch', () => {
+    const languages: LanguageInfo[] = [{ cultureName: 'en' }];
+
+    test('should no-op when useRouteBasedCulture is false', () => {
+      expect(normalizeUrlForRouteCultureMatch('/en/identity/users', false, languages)).toBe(
+        '/en/identity/users',
+      );
+    });
+
+    test('should strip when enabled', () => {
+      expect(normalizeUrlForRouteCultureMatch('/en/identity/users', true, languages)).toBe(
+        '/identity/users',
+      );
+    });
+  });
+});
diff --git a/npm/ng-packs/packages/core/src/lib/tests/route-culture-url-matcher.spec.ts b/npm/ng-packs/packages/core/src/lib/tests/route-culture-url-matcher.spec.ts
new file mode 100644
index 0000000000..bad77e0aac
--- /dev/null
+++ b/npm/ng-packs/packages/core/src/lib/tests/route-culture-url-matcher.spec.ts
@@ -0,0 +1,44 @@
+import { UrlSegment } from '@angular/router';
+import {
+  createRouteCultureUrlMatcher,
+  isLikelyCultureSegment,
+} from '../utils/route-culture-url-matcher';
+
+describe('route-culture-url-matcher', () => {
+  describe('#isLikelyCultureSegment', () => {
+    test.each`
+      segment        | expected
+      ${''}          | ${false}
+      ${'en'}        | ${true}
+      ${'tr'}        | ${true}
+      ${'zh-Hans'}   | ${true}
+      ${'pt-BR'}     | ${true}
+      ${'home'}      | ${false}
+      ${'identity'}  | ${false}
+      ${'cms-kit'}   | ${false}
+      ${'account'}   | ${false}
+    `('should return $expected when segment is $segment', ({ segment, expected }) => {
+      expect(isLikelyCultureSegment(segment)).toBe(expected);
+    });
+  });
+
+  describe('#createRouteCultureUrlMatcher', () => {
+    const matcher = createRouteCultureUrlMatcher();
+
+    test('should consume first segment when it is a culture code', () => {
+      const segments = [new UrlSegment('en', {}), new UrlSegment('home', {})];
+      const result = matcher(segments, null as any, {} as any);
+      expect(result?.consumed).toEqual([segments[0]]);
+      expect(result?.posParams?.culture).toBe(segments[0]);
+    });
+
+    test('should return null when first segment is not a culture code', () => {
+      const segments = [new UrlSegment('identity', {})];
+      expect(matcher(segments, null as any, {} as any)).toBeNull();
+    });
+
+    test('should return null when there are no segments', () => {
+      expect(matcher([], null as any, {} as any)).toBeNull();
+    });
+  });
+});
diff --git a/npm/ng-packs/packages/core/src/lib/utils/index.ts b/npm/ng-packs/packages/core/src/lib/utils/index.ts
index 9b542ec5b4..2a03a36c4e 100644
--- a/npm/ng-packs/packages/core/src/lib/utils/index.ts
+++ b/npm/ng-packs/packages/core/src/lib/utils/index.ts
@@ -15,6 +15,8 @@ export * from './multi-tenancy-utils';
 export * from './number-utils';
 export * from './object-utils';
 export * from './queue';
+export * from './route-based-culture.utils';
+export * from './route-culture-url-matcher';
 export * from './route-utils';
 export * from './string-utils';
 export * from './tree-utils';
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 414f4d0a31..1534648a72 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
@@ -1,4 +1,4 @@
-import { registerLocaleData } from '@angular/common';
+import { Location, registerLocaleData } from '@angular/common';
 import { inject, Injector } from '@angular/core';
 import { tap, catchError } from 'rxjs/operators';
 import { firstValueFrom, lastValueFrom, of, throwError, timeout } from 'rxjs';
@@ -7,6 +7,7 @@ import { Environment } from '../models/environment';
 import { CurrentTenantDto } from '../proxy/volo/abp/asp-net-core/mvc/multi-tenancy/models';
 import { ConfigStateService } from '../services/config-state.service';
 import { EnvironmentService } from '../services/environment.service';
+import { RouteBasedCultureService } from '../services/route-based-culture.service';
 import { SessionStateService } from '../services/session-state.service';
 import { CORE_OPTIONS } from '../tokens/options.token';
 import { APP_INIT_ERROR_HANDLERS } from '../tokens/app-config.token';
@@ -63,6 +64,9 @@ export async function getInitialData() {
     await lastValueFrom(result$);
   }
 
+  const routeBasedCulture = injector.get(RouteBasedCultureService);
+  routeBasedCulture.syncLanguageFromUrl(injector.get(Location).path());
+
   await localeInitializer(injector);
 }
 
diff --git a/npm/ng-packs/packages/core/src/lib/utils/route-based-culture.utils.ts b/npm/ng-packs/packages/core/src/lib/utils/route-based-culture.utils.ts
new file mode 100644
index 0000000000..3c0f92b357
--- /dev/null
+++ b/npm/ng-packs/packages/core/src/lib/utils/route-based-culture.utils.ts
@@ -0,0 +1,82 @@
+import type { LanguageInfo } from '../proxy/volo/abp/localization/models';
+
+/**
+ * Returns the first path segment of a URL path (leading slashes are ignored).
+ * Strips query string and fragment first (e.g. "/zh-Hans/account?x=1" → "zh-Hans").
+ */
+export function getFirstPathSegment(urlPath: string): string {
+  if (!urlPath) {
+    return '';
+  }
+
+  const suffixIndex = urlPath.search(/[?#]/);
+  const pathPart = suffixIndex >= 0 ? urlPath.slice(0, suffixIndex) : urlPath;
+  const segments = pathPart.split('/').filter(s => s.length > 0);
+
+  return segments[0] ?? '';
+}
+
+/**
+ * If the first segment matches a configured language culture name (case-insensitive),
+ * returns the canonical culture name from configuration; otherwise undefined.
+ */
+export function findMatchingCultureName(
+  firstSegment: string,
+  languages: LanguageInfo[] | undefined,
+): string | undefined {
+  if (!firstSegment || !languages?.length) {
+    return undefined;
+  }
+
+  const normalized = firstSegment.toLowerCase();
+  const match = languages.find(
+    lang => lang.cultureName && lang.cultureName.toLowerCase() === normalized,
+  );
+
+  return match?.cultureName;
+}
+
+/**
+ * Removes the first path segment when it matches a configured UI culture (e.g. `/en/identity/users` → `/identity/users`).
+ * Use when comparing the **browser URL** to **menu links** that omit the culture segment.
+ */
+export function stripCultureSegmentFromPath(
+  path: string,
+  languages: LanguageInfo[] | undefined,
+): string {
+  if (!path || !languages?.length) {
+    return path;
+  }
+
+  const pathEnd = path.search(/[?#]/);
+  const pathOnly = pathEnd >= 0 ? path.slice(0, pathEnd) : path;
+  const suffix = pathEnd >= 0 ? path.slice(pathEnd) : '';
+
+  const first = getFirstPathSegment(pathOnly);
+  if (!first || !findMatchingCultureName(first, languages)) {
+    return path;
+  }
+
+  const segments = pathOnly.split('/').filter(s => s.length > 0);
+  if (segments.length === 0) {
+    return path;
+  }
+
+  const rest = segments.slice(1);
+  const normalized = rest.length ? '/' + rest.join('/') : '/';
+  return normalized + suffix;
+}
+
+/**
+ * When route-based culture is enabled, normalizes URLs for comparison with menu routes that do not include a culture prefix.
+ */
+export function normalizeUrlForRouteCultureMatch(
+  path: string,
+  useRouteBasedCulture: boolean,
+  languages: LanguageInfo[] | undefined,
+): string {
+  if (!useRouteBasedCulture || !path) {
+    return path;
+  }
+  return stripCultureSegmentFromPath(path, languages);
+}
diff --git a/npm/ng-packs/packages/core/src/lib/utils/route-culture-url-matcher.ts b/npm/ng-packs/packages/core/src/lib/utils/route-culture-url-matcher.ts
new file mode 100644
index 0000000000..0093c5cb67
--- /dev/null
+++ b/npm/ng-packs/packages/core/src/lib/utils/route-culture-url-matcher.ts
@@ -0,0 +1,59 @@
+import { Route, Routes, UrlMatchResult, UrlSegment, UrlSegmentGroup } from '@angular/router';
+
+/**
+ * Heuristic: first path segment looks like a BCP 47-style culture code (e.g. en, tr, zh-Hans, pt-BR).
+ * Used by the optional culture URL matcher so real routes like `identity` or `cms-kit` are not mistaken for cultures.
+ */
+export function isLikelyCultureSegment(segment: string): boolean {
+  if (!segment) {
+    return false;
+  }
+
+  return /^[a-z]{2}(-[a-zA-Z0-9]{2,8})?$/.test(segment);
+}
+
+/**
+ * Matcher that consumes the first segment when it looks like a culture code.
+ * Exposes it as the route param `culture` on matched routes.
+ */
+export function createRouteCultureUrlMatcher(): (
+  segments: UrlSegment[],
+  group: UrlSegmentGroup,
+  route: Route,
+) => UrlMatchResult | null {
+  return (segments: UrlSegment[]) => {
+    if (segments.length < 1) {
+      return null;
+    }
+
+    const first = segments[0].path;
+    if (!isLikelyCultureSegment(first)) {
+      return null;
+    }
+
+    return {
+      consumed: [segments[0]],
+      posParams: { culture: segments[0] },
+    };
+  };
+}
+
+/**
+ * Wraps your app routes so the same URLs work with or without a leading culture segment.
+ *
+ * Examples (same components for both shapes):
+ * - `/` and `/en`
+ * - `/home` and `/en/home`
+ * - `/identity/users` and `/en/identity/users`
+ *
+ * The culture segment is matched only when it passes {@link isLikelyCultureSegment} (e.g. `en`, `tr-TR`, `zh-Hans`).
+ * Session language from the URL is still applied only when `localization.useRouteBasedCulture` is true (`RouteBasedCultureService`).
+ */
+export function withOptionalRouteCulturePrefix(routes: Routes): Routes {
+  const matcher = createRouteCultureUrlMatcher();
+
+  return [
+    { matcher, children: [...routes] },
+    { path: '', children: [...routes] },
+  ];
+}