diff --git a/ts/packages/azure-ai-foundry/src/wikipedia.ts b/ts/packages/azure-ai-foundry/src/wikipedia.ts
index f1356c4166..184cf63135 100644
--- a/ts/packages/azure-ai-foundry/src/wikipedia.ts
+++ b/ts/packages/azure-ai-foundry/src/wikipedia.ts
@@ -93,15 +93,16 @@ export function apiSettingsFromEnv(
  * Get the page object of the item with the supplied title.
  * @param title - The title of the page to retrieve
  * @param config - The wikipedia API configuration
+ * @param locale - The Wikipedia language edition (e.g. "en", "de", "fr"). Defaults to "en".
  * @returns The page object.
  */
 export async function getPageObject(
     title: string,
     config: wikipedia.WikipediaApiSettings,
+    locale: string = "en",
 ) {
-    // TODO: localization (e.g. en, de, fr, etc.)
     const response = await fetch(
-        `${config.endpoint}core/v1/wikipedia/en/page/${title}/bare`,
+        `${config.endpoint}core/v1/wikipedia/${locale}/page/${encodeWikipediaTitle(title)}/bare`,
         { method: "GET", headers: await config.getAPIHeaders() },
     );
 
@@ -116,14 +117,15 @@ export async function getPageObject(
  *
  * @param title - The title of the page whose content to get.
  * @param config - The wikipedia API configuration
- * @returns - The content of the requetsed page or undefined if there was a problem
+ * @param locale - The Wikipedia language edition (e.g. "en", "de", "fr"). Defaults to "en".
+ * @returns - The content of the requested page or undefined if there was a problem
  */
 export async function getPageMarkdown(
     title: string,
     config: wikipedia.WikipediaApiSettings,
+    locale: string = "en",
 ): Promise<string | undefined> {
-    // TODO: localization (e.g. en, de, fr, etc.)
-    const url: string = `${config.endpoint}en/page/${encodeWikipediaTitle(title)}`;
+    const url: string = `${config.endpoint}${locale}/page/${encodeWikipediaTitle(title)}`;
     const response = await fetch(url, {
         method: "GET",
         headers: await config.getAPIHeaders(),
diff --git a/ts/packages/azure-ai-foundry/test/wikipedia.spec.ts b/ts/packages/azure-ai-foundry/test/wikipedia.spec.ts
new file mode 100644
index 0000000000..a8016e8d3a
--- /dev/null
+++ b/ts/packages/azure-ai-foundry/test/wikipedia.spec.ts
@@ -0,0 +1,106 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+import {
+    encodeWikipediaTitle,
+    getPageObject,
+    getPageMarkdown,
+} from "../src/wikipedia.js";
+import { WikipediaApiSettings } from "../src/wikipedia.js";
+
+// Minimal stub — only getAPIHeaders is needed for the fetch calls under test
+function makeConfig(endpoint: string): WikipediaApiSettings {
+    return {
+        endpoint,
+        getToken: async () => "token",
+        getAPIHeaders: async () => ({ Authorization: "Bearer token" }),
+    };
+}
+
+describe("encodeWikipediaTitle", () => {
+    test("replaces spaces with underscores", () => {
+        expect(encodeWikipediaTitle("Johann Sebastian Bach")).toBe(
+            "Johann_Sebastian_Bach",
+        );
+    });
+
+    test("percent-encodes special characters", () => {
+        expect(encodeWikipediaTitle("Ångström")).toBe("%C3%85ngstr%C3%B6m");
+    });
+
+    test("leaves plain ASCII titles unchanged", () => {
+        expect(encodeWikipediaTitle("Berlin")).toBe("Berlin");
+    });
+});
+
+describe("getPageObject locale", () => {
+    let capturedUrl: string;
+    const originalFetch = globalThis.fetch;
+
+    beforeEach(() => {
+        globalThis.fetch = async (input: string | URL | Request) => {
+            capturedUrl = input.toString();
+            return { ok: false } as Response; // return undefined from the function under test
+        };
+    });
+
+    afterEach(() => {
+        globalThis.fetch = originalFetch;
+    });
+
+    test("defaults to 'en' locale", async () => {
+        const config = makeConfig("https://api.example.com/");
+        await getPageObject("Berlin", config);
+        expect(capturedUrl).toContain("/en/");
+    });
+
+    test("uses supplied locale in URL", async () => {
+        const config = makeConfig("https://api.example.com/");
+        await getPageObject("Berlin", config, "de");
+        expect(capturedUrl).toContain("/de/");
+        expect(capturedUrl).not.toContain("/en/");
+    });
+
+    test("constructs correct URL shape for 'fr'", async () => {
+        const config = makeConfig("https://api.example.com/");
+        await getPageObject("Paris", config, "fr");
+        expect(capturedUrl).toBe(
+            "https://api.example.com/core/v1/wikipedia/fr/page/Paris/bare",
+        );
+    });
+});
+
+describe("getPageMarkdown locale", () => {
+    let capturedUrl: string;
+    const originalFetch = globalThis.fetch;
+
+    beforeEach(() => {
+        globalThis.fetch = async (input: string | URL | Request) => {
+            capturedUrl = input.toString();
+            return { ok: false } as Response;
+        };
+    });
+
+    afterEach(() => {
+        globalThis.fetch = originalFetch;
+    });
+
+    test("defaults to 'en' locale", async () => {
+        const config = makeConfig("https://api.example.com/");
+        await getPageMarkdown("Berlin", config);
+        expect(capturedUrl).toContain("/en/");
+    });
+
+    test("uses supplied locale in URL", async () => {
+        const config = makeConfig("https://api.example.com/");
+        await getPageMarkdown("Berlin", config, "de");
+        expect(capturedUrl).toContain("/de/");
+        expect(capturedUrl).not.toContain("/en/");
+    });
+
+    test("constructs correct URL shape for 'ja'", async () => {
+        const config = makeConfig("https://api.example.com/");
+        await getPageMarkdown("Tokyo", config, "ja");
+        expect(capturedUrl).toBe("https://api.example.com/ja/page/Tokyo");
+    });
+});