diff --git a/website/.env.example b/website/.env.example
index 5e5f0d65a..089a2d5e3 100644
--- a/website/.env.example
+++ b/website/.env.example
@@ -1 +1,2 @@
-VITE_LISTEN_ALL_ADDRESSES=true  # 開発用にViteが全てのアドレスでlistenするかどうか
+# Whether Vite should listen on all addresses for development.
+VITE_LISTEN_ALL_ADDRESSES=true
diff --git a/website/src/components/ui/HtmlContent.tsx b/website/src/components/ui/HtmlContent.tsx
index d4544a7df..03434dbb2 100644
--- a/website/src/components/ui/HtmlContent.tsx
+++ b/website/src/components/ui/HtmlContent.tsx
@@ -23,7 +23,7 @@ export const HtmlContent: FC<HtmlContentProps> = ({ html }) => {
 				"[&_pre_code]:block",
 				"[&_pre_code]:w-full",
 			])}
-			// biome-ignore lint/security/noDangerouslySetInnerHtml: typst-docsで生成されたHTMLを表示する
+			// biome-ignore lint/security/noDangerouslySetInnerHtml: Displaying HTML generated by typst-docs.
 			dangerouslySetInnerHTML={{ __html: html }}
 		/>
 	);
diff --git a/website/src/components/ui/common/SearchWindow.tsx b/website/src/components/ui/common/SearchWindow.tsx
index 06723eaa0..d3186c047 100644
--- a/website/src/components/ui/common/SearchWindow.tsx
+++ b/website/src/components/ui/common/SearchWindow.tsx
@@ -39,7 +39,7 @@ export const SearchWindow: FC = () => {
 			</div>
 			{!import.meta.env.DEV && (
 				<script
-					// biome-ignore lint/security/noDangerouslySetInnerHtml: pagefindで生成されたスクリプトを実行する
+					// biome-ignore lint/security/noDangerouslySetInnerHtml: Execute scripts generated by pagefind.
 					dangerouslySetInnerHTML={{
 						__html: `window.addEventListener('DOMContentLoaded', (event) => {
 	new PagefindUI({ element: "#search", showSubResults: true });
diff --git a/website/src/components/ui/genPath.ts b/website/src/components/ui/genPath.ts
index 10de3b820..1b8493efe 100644
--- a/website/src/components/ui/genPath.ts
+++ b/website/src/components/ui/genPath.ts
@@ -1,10 +1,10 @@
 import type { Func } from "../../types/model";
 
 /**
- * pathを連結する
+ * Concatenates path segments.
  *
- * @param item - Func
- * @returns - 連結されたpath
+ * @param item - A Func object
+ * @returns - The concatenated path string
  */
 export const genPath = (item: Func): string => {
 	return item.path.map((s) => `${s}.`).join("");
diff --git a/website/src/components/ui/type2href.ts b/website/src/components/ui/type2href.ts
index d75f8dde2..8440a65a4 100644
--- a/website/src/components/ui/type2href.ts
+++ b/website/src/components/ui/type2href.ts
@@ -1,8 +1,8 @@
 /**
- * 型名からリンクを取得する
+ * Retrieve a link from a type name.
  *
- * @param parameterType 型名
- * @returns リンク
+ * @param parameterType The type name.
+ * @returns The link.
  */
 export const type2href = (parameterType: string): string | null => {
 	const foundationSet = new Set([
diff --git a/website/src/globals.css b/website/src/globals.css
index f73d927cd..742c9ee18 100644
--- a/website/src/globals.css
+++ b/website/src/globals.css
@@ -68,13 +68,13 @@ samp {
 	@apply pt-4;
 }
 
-/* Alpine.jsのx-cloak属性を持つ要素を非表示にする */
+/* Hide elements with the x-cloak attribute from Alpine.js */
 [x-cloak] {
 	display: none !important;
 	visibility: hidden;
 }
 
-/* Inline codeのスタイルをGitHub風にする */
+/* Style inline code blocks with GitHub-style appearance */
 .prose :not(pre) > code {
 	background-color: rgba(175, 184, 193, 0.2);
 	font-size: 0.875em;
@@ -91,7 +91,7 @@ samp {
 	}
 }
 
-/* Code blockをMonokai風にする */
+/* Style code blocks with Monokai theme */
 pre code span.typ-comment {
 	color: #88846f;
 }
diff --git a/website/src/index.tsx b/website/src/index.tsx
index 5312e595f..54bbbad7f 100644
--- a/website/src/index.tsx
+++ b/website/src/index.tsx
@@ -16,13 +16,13 @@ import { isPageOfKind } from "./utils/isPageOfKind";
 import { removeBasePath } from "./utils/path";
 import { registerRoutes } from "./utils/translationStatus";
 
-// typst-docsが生成したドキュメント
+// Documentation generated by typst-docs.
 import docsJson from "../../docs.json";
 const docs = docsJson as unknown as Page[];
 
 const [flattenedPages, pagePaths] = flattenDocs(docs);
 
-// 未知のページを未翻訳として登録する
+// Register unknown pages as untranslated.
 const allRoutes = flattenedPages.map((page) => page.route);
 registerRoutes(allRoutes);
 
diff --git a/website/src/types/model.ts b/website/src/types/model.ts
index c1433e9ab..63f0c1d10 100644
--- a/website/src/types/model.ts
+++ b/website/src/types/model.ts
@@ -1,8 +1,8 @@
-// docs.jsonの型
-// cf. docs/src/model.rs
+// Type definitions for `docs.json`.
+// Reference: `docs/src/model.rs`
 
 /**
- * ページ情報
+ * Details about a documentation page and its children.
  */
 export type Page = {
 	route: string;
@@ -15,7 +15,7 @@ export type Page = {
 };
 
 /**
- * アウトライン情報
+ * An element in the outline.
  */
 export type OutlineItem = {
 	id: string;
@@ -24,7 +24,7 @@ export type OutlineItem = {
 };
 
 /**
- * 本文情報
+ * Details about the body of a documentation page.
  */
 export type Body =
 	| HtmlBody
diff --git a/website/src/utils/flattenDocs.test.ts b/website/src/utils/flattenDocs.test.ts
index 4b356ad1c..1b31031c6 100644
--- a/website/src/utils/flattenDocs.test.ts
+++ b/website/src/utils/flattenDocs.test.ts
@@ -20,14 +20,14 @@ describe("flattenDocs", () => {
 		children,
 	});
 
-	it("空の配列を渡すと空の結果を返す", () => {
+	it("should return an empty result when given an empty array", () => {
 		const [flattenedPages, pagePaths] = flattenDocs([]);
 
 		expect(flattenedPages).toEqual([]);
 		expect(pagePaths).toEqual([]);
 	});
 
-	it("子を持たない単一ページを平坦化する", () => {
+	it("should flatten a single page with no children", () => {
 		const page = createMockPage("/docs/", "Documentation");
 		const [flattenedPages, pagePaths] = flattenDocs([page]);
 
@@ -35,7 +35,7 @@ describe("flattenDocs", () => {
 		expect(pagePaths).toEqual([[page]]);
 	});
 
-	it("複数の子を持たないページを平坦化する", () => {
+	it("should flatten multiple pages with no children", () => {
 		const page1 = createMockPage("/docs/", "Documentation");
 		const page2 = createMockPage("/tutorial/", "Tutorial");
 		const [flattenedPages, pagePaths] = flattenDocs([page1, page2]);
@@ -44,7 +44,7 @@ describe("flattenDocs", () => {
 		expect(pagePaths).toEqual([[page1], [page2]]);
 	});
 
-	it("子を持つページを平坦化する", () => {
+	it("should flatten a page with children", () => {
 		const childPage = createMockPage("/docs/tutorial/", "Tutorial");
 		const parentPage = createMockPage("/docs/", "Documentation", [childPage]);
 		const [flattenedPages, pagePaths] = flattenDocs([parentPage]);
@@ -53,7 +53,7 @@ describe("flattenDocs", () => {
 		expect(pagePaths).toEqual([[parentPage], [parentPage, childPage]]);
 	});
 
-	it("複数階層のページを平坦化する", () => {
+	it("should flatten pages with multiple levels of children", () => {
 		const grandChildPage = createMockPage("/docs/tutorial/basics/", "Basics");
 		const childPage = createMockPage("/docs/tutorial/", "Tutorial", [
 			grandChildPage,
@@ -69,7 +69,7 @@ describe("flattenDocs", () => {
 		]);
 	});
 
-	it("複数の子を持つページを平坦化する", () => {
+	it("should flatten a page with multiple children", () => {
 		const child1 = createMockPage("/docs/tutorial/", "Tutorial");
 		const child2 = createMockPage("/docs/reference/", "Reference");
 		const parentPage = createMockPage("/docs/", "Documentation", [
@@ -86,7 +86,7 @@ describe("flattenDocs", () => {
 		]);
 	});
 
-	it("複雑な階層構造を平坦化する", () => {
+	it("should flatten a complex hierarchical structure", () => {
 		// docs/
 		//   ├── tutorial/
 		//   │   ├── basics/
@@ -130,7 +130,7 @@ describe("flattenDocs", () => {
 		]);
 	});
 
-	it("複数のルートページを持つ階層構造を平坦化する", () => {
+	it("should flatten a hierarchical structure with multiple root pages", () => {
 		const tutorialChild = createMockPage("/tutorial/basics/", "Basics");
 		const tutorial = createMockPage("/tutorial/", "Tutorial", [tutorialChild]);
 
@@ -148,7 +148,7 @@ describe("flattenDocs", () => {
 		]);
 	});
 
-	it("パス情報が正しく設定される", () => {
+	it("should correctly set path information", () => {
 		const grandChild = createMockPage("/a/b/c/", "C");
 		const child = createMockPage("/a/b/", "B", [grandChild]);
 		const parent = createMockPage("/a/", "A", [child]);
diff --git a/website/src/utils/flattenDocs.ts b/website/src/utils/flattenDocs.ts
index 542f6edd4..9c1c9f6db 100644
--- a/website/src/utils/flattenDocs.ts
+++ b/website/src/utils/flattenDocs.ts
@@ -1,15 +1,17 @@
 import type { Page } from "../types/model";
 
 /**
- * ドキュメントの階層構造を平坦化する
- * パンくずリストと前後のページ情報を取得するために使用する
+ * Flattens the hierarchical structure of documents.
+ * Used to retrieve breadcrumb navigation and previous/next page information.
  *
- * @param docs ページ情報の配列
- * @returns [平坦化されたページ情報のリスト, ページ情報のパス情報]
+ * @param docs An array of page objects containing document information.
+ * @returns A tuple containing:
+ *          - A flattened list of page objects
+ *          - An array of arrays representing the path information for each page object
  */
 export const flattenDocs = (docs: Page[]): [Page[], Page[][]] => {
-	const flattenedPages: Page[] = []; // 平坦化されたページ情報のリスト
-	const pagePaths: Page[][] = []; // ページ情報[i]のパス情報
+	const flattenedPages: Page[] = []; // List to store flattened page objects.
+	const pagePaths: Page[][] = []; // Path information for each page object [i].
 
 	const _flattenDocs = (page: Page, pagePath: Page[]): void => {
 		flattenedPages.push(page);
diff --git a/website/src/utils/isPageOfKind.test.ts b/website/src/utils/isPageOfKind.test.ts
index d25c0e379..a5b071c1b 100644
--- a/website/src/utils/isPageOfKind.test.ts
+++ b/website/src/utils/isPageOfKind.test.ts
@@ -12,7 +12,7 @@ describe("isPageOfKind", () => {
 		children: [],
 	});
 
-	it("htmlページを正しく判定する", () => {
+	it("correctly identifies HTML pages", () => {
 		const htmlPage: Page = {
 			...createBasePage(),
 			body: {
@@ -29,7 +29,7 @@ describe("isPageOfKind", () => {
 		expect(isPageOfKind(htmlPage, "symbols")).toBe(false);
 	});
 
-	it("funcページを正しく判定する", () => {
+	it("correctly identifies func pages", () => {
 		const funcPage: Page = {
 			...createBasePage(),
 			body: {
@@ -61,7 +61,7 @@ describe("isPageOfKind", () => {
 		expect(isPageOfKind(funcPage, "symbols")).toBe(false);
 	});
 
-	it("categoryページを正しく判定する", () => {
+	it("correctly identifies category pages", () => {
 		const categoryPage: Page = {
 			...createBasePage(),
 			body: {
@@ -84,7 +84,7 @@ describe("isPageOfKind", () => {
 		expect(isPageOfKind(categoryPage, "symbols")).toBe(false);
 	});
 
-	it("groupページを正しく判定する", () => {
+	it("correctly identifies group pages", () => {
 		const groupPage: Page = {
 			...createBasePage(),
 			body: {
@@ -106,7 +106,7 @@ describe("isPageOfKind", () => {
 		expect(isPageOfKind(groupPage, "symbols")).toBe(false);
 	});
 
-	it("typeページを正しく判定する", () => {
+	it("correctly identifies type pages", () => {
 		const typePage: Page = {
 			...createBasePage(),
 			body: {
@@ -131,7 +131,7 @@ describe("isPageOfKind", () => {
 		expect(isPageOfKind(typePage, "symbols")).toBe(false);
 	});
 
-	it("symbolsページを正しく判定する", () => {
+	it("correctly identifies symbols pages", () => {
 		const symbolsPage: Page = {
 			...createBasePage(),
 			body: {
@@ -153,7 +153,7 @@ describe("isPageOfKind", () => {
 		expect(isPageOfKind(symbolsPage, "type")).toBe(false);
 	});
 
-	it("型ガードとして正しく動作する", () => {
+	it("functions correctly as a type guard", () => {
 		const htmlPage: Page = {
 			...createBasePage(),
 			body: {
@@ -194,11 +194,11 @@ describe("isPageOfKind", () => {
 		}
 
 		if (isPageOfKind(htmlPage, "func")) {
-			expect.fail("この分岐は実行されるべきではない");
+			expect.fail("This branch should never be executed");
 		}
 	});
 
-	it("複数のページタイプを配列で処理する", () => {
+	it("handles multiple page types in an array", () => {
 		const pages: Page[] = [
 			{
 				...createBasePage(),
diff --git a/website/src/utils/isPageOfKind.ts b/website/src/utils/isPageOfKind.ts
index fca19be2e..6e896feb8 100644
--- a/website/src/utils/isPageOfKind.ts
+++ b/website/src/utils/isPageOfKind.ts
@@ -1,11 +1,11 @@
 import type { Body, Page } from "../types/model";
 
 /**
- * ページの種類を判定するための型ガード関数
+ * Type guard function to determine if a page belongs to a specific kind.
  *
- * @param page - 判定するページ
- * @param kind - 判定する種類
- * @returns - ページが指定された種類であるかどうか
+ * @param page - The page to check.
+ * @param kind - The kind to check against.
+ * @returns - A type predicate indicating whether the page is of the specified kind.
  **/
 export const isPageOfKind = <K extends Body["kind"]>(
 	page: Page,
diff --git a/website/src/utils/translationStatus.test.ts b/website/src/utils/translationStatus.test.ts
index 4d6b92a2d..699ab6f63 100644
--- a/website/src/utils/translationStatus.test.ts
+++ b/website/src/utils/translationStatus.test.ts
@@ -27,7 +27,7 @@ describe("translationStatus", () => {
 	});
 
 	describe("loadTranslationStatus", () => {
-		it("ファイルが存在する場合にJSONを読み込んで返す", async () => {
+		it("should read and return JSON when the file exists", async () => {
 			const { loadTranslationStatus } = await import("./translationStatus");
 
 			const mockData = {
@@ -45,7 +45,7 @@ describe("translationStatus", () => {
 			expect(result).toEqual(mockData);
 		});
 
-		it("ファイルが存在しない場合に空のオブジェクトを返す", async () => {
+		it("should return an empty object when the file does not exist", async () => {
 			const { loadTranslationStatus } = await import("./translationStatus");
 
 			mockFs.existsSync.mockReturnValue(false);
@@ -59,7 +59,7 @@ describe("translationStatus", () => {
 	});
 
 	describe("saveTranslationStatus", () => {
-		it("翻訳状態をJSONファイルに保存する", async () => {
+		it("should save translation status to a JSON file", async () => {
 			const { saveTranslationStatus } = await import("./translationStatus");
 
 			const status: TranslationStatusMap = {
@@ -87,7 +87,7 @@ describe("translationStatus", () => {
 			mockFs.existsSync.mockReturnValue(true);
 		});
 
-		it("新しいルートを未翻訳として登録する", async () => {
+		it("should register new routes as untranslated", async () => {
 			const { registerRoutes } = await import("./translationStatus");
 
 			const existingStatus = {
@@ -108,7 +108,7 @@ describe("translationStatus", () => {
 			expect(savedData["/docs/new-page/"]).toBe("untranslated");
 		});
 
-		it("既存のルートは変更しない", async () => {
+		it("should not modify existing routes", async () => {
 			const { registerRoutes } = await import("./translationStatus");
 
 			const existingStatus = {
@@ -130,7 +130,7 @@ describe("translationStatus", () => {
 			mockFs.existsSync.mockReturnValue(true);
 		});
 
-		it("翻訳進捗率を正しく計算する", async () => {
+		it("correctly calculates the translation progress rate", async () => {
 			const { calculateTranslationProgressRate } = await import(
 				"./translationStatus"
 			);
@@ -151,7 +151,7 @@ describe("translationStatus", () => {
 			expect(result).toBe(0.625);
 		});
 
-		it("originalページは計算から除外される", async () => {
+		it("original pages are excluded from calculation", async () => {
 			const { calculateTranslationProgressRate } = await import(
 				"./translationStatus"
 			);
@@ -160,8 +160,8 @@ describe("translationStatus", () => {
 				$schema: "./translation-status.schema.json",
 				"/docs/page1/": "translated", // 1.0
 				"/docs/page2/": "partially_translated", // 0.5
-				"/docs/original1/": "community", // 除外
-				"/docs/original2/": "community", // 除外
+				"/docs/original1/": "community", // Excluded
+				"/docs/original2/": "community", // Excluded
 				"/docs/page3/": "untranslated", // 0.0
 			};
 
@@ -173,7 +173,7 @@ describe("translationStatus", () => {
 			expect(result).toBe(0.5);
 		});
 
-		it("全てoriginalページの場合は0を返す", async () => {
+		it("returns 0 when all pages are original", async () => {
 			const { calculateTranslationProgressRate } = await import(
 				"./translationStatus"
 			);
@@ -191,7 +191,7 @@ describe("translationStatus", () => {
 			expect(result).toBe(0);
 		});
 
-		it("ページが存在しない場合は0を返す", async () => {
+		it("returns 0 when a page does not exist", async () => {
 			const { calculateTranslationProgressRate } = await import(
 				"./translationStatus"
 			);
@@ -207,7 +207,7 @@ describe("translationStatus", () => {
 			expect(result).toBe(0);
 		});
 
-		it("$schemaキーは計算から除外する", async () => {
+		it("excludes the $schema key from calculation", async () => {
 			const { calculateTranslationProgressRate } = await import(
 				"./translationStatus"
 			);
@@ -226,7 +226,7 @@ describe("translationStatus", () => {
 	});
 
 	describe("getTranslationStatus", () => {
-		it("指定されたルートの翻訳状態を返す", async () => {
+		it("returns the translation status of the specified route", async () => {
 			const { getTranslationStatus } = await import("./translationStatus");
 
 			const status = {
@@ -243,7 +243,7 @@ describe("translationStatus", () => {
 			);
 		});
 
-		it('存在しないルートの場合は"untranslated"を返す', async () => {
+		it('returns "untranslated" for a non-existent route', async () => {
 			const { getTranslationStatus } = await import("./translationStatus");
 
 			const status = {
@@ -256,7 +256,7 @@ describe("translationStatus", () => {
 			expect(getTranslationStatus("/docs/nonexistent/")).toBe("untranslated");
 		});
 
-		it("2回目の呼び出しではキャッシュを使用する", async () => {
+		it("uses cache for the second and subsequent calls", async () => {
 			vi.resetModules();
 			const { getTranslationStatus: freshGetTranslationStatus } = await import(
 				"./translationStatus"
diff --git a/website/src/utils/translationStatus.ts b/website/src/utils/translationStatus.ts
index f7ac4e567..8e7db2922 100644
--- a/website/src/utils/translationStatus.ts
+++ b/website/src/utils/translationStatus.ts
@@ -17,8 +17,8 @@ const TRANSLATION_STATUS_FILE = path.resolve(
 );
 
 /**
- * ページの翻訳状態を管理しているJSONファイルを読み込む。ファイルが存在しない場合は空のオブジェクトを返す。
- * @returns ページの翻訳状態を示すオブジェクト。
+ * Loads the JSON file managing translation status for a page. If the file does not exist, returns an empty object.
+ * @returns An object representing the translation status of the page.
  */
 export const loadTranslationStatus = (): TranslationStatusMap => {
 	if (fs.existsSync(TRANSLATION_STATUS_FILE)) {
@@ -30,8 +30,8 @@ export const loadTranslationStatus = (): TranslationStatusMap => {
 };
 
 /**
- * ページの翻訳状態を管理しているJSONファイルに書き込む。
- * @param status ページの翻訳状態を示すオブジェクト。
+ * Writes the page's translation status to the JSON file.
+ * @param status An object representing the translation status of the page.
  */
 export const saveTranslationStatus = (status: TranslationStatusMap): void => {
 	const json = {
@@ -46,8 +46,8 @@ export const saveTranslationStatus = (status: TranslationStatusMap): void => {
 };
 
 /**
- * 新規ページのルートを未翻訳として登録する。既に登録されているルートは無視される。
- * @param routes 登録するページのルートの配列。
+ * Registers new page routes as untranslated. Existing routes are ignored.
+ * @param routes An array of page route paths to register.
  */
 export const registerRoutes = (routes: string[]): void => {
 	const status = loadTranslationStatus();
@@ -66,10 +66,10 @@ export const registerRoutes = (routes: string[]): void => {
 };
 
 /**
- * 翻訳の進捗率を計算する。
- * `translated`は1.0、`partially_translated`は0.5の重みを持つ。
- * `original`は翻訳対象外のため計算から除外される。
- * @returns [0.0, 1.0]の範囲で表される翻訳率
+ * Calculates the translation progress rate.
+ * `translated` has a weight of 1.0, `partially_translated` has a weight of 0.5.
+ * `original` routes are excluded from calculation as they are not translatable.
+ * @returns A translation rate between 0.0 and 1.0.
  */
 export const calculateTranslationProgressRate = (): number => {
 	const status = loadTranslationStatus();
@@ -99,9 +99,9 @@ export const calculateTranslationProgressRate = (): number => {
 let translationStatusCache: TranslationStatusMap | null = null;
 
 /**
- * 指定されたルートの翻訳状態を取得する。
- * @param route 翻訳状態を取得するページのルート
- * @returns 翻訳状態。存在しない場合は"untranslated"を返す。
+ * Retrieves the translation status for a specified route.
+ * @param route The page route for which to retrieve the translation status.
+ * @returns The translation status, or "untranslated" if the route does not exist.
  */
 export const getTranslationStatus = (route: string): TranslationStatus => {
 	if (translationStatusCache === null) {
diff --git a/website/translation-status.schema.json b/website/translation-status.schema.json
index d97147349..c3c6b577e 100644
--- a/website/translation-status.schema.json
+++ b/website/translation-status.schema.json
@@ -1,17 +1,17 @@
 {
 	"$schema": "http://json-schema.org/draft-07/schema#",
-	"title": "ページの翻訳状態",
-	"description": "各ページの翻訳状態を管理するためのJSONファイル",
+	"title": "Page Translation Status",
+	"description": "A JSON file for managing the translation status of each page",
 	"type": "object",
 	"properties": {
 		"$schema": {
 			"type": "string",
-			"description": "このJSONファイルで使用されるJSONスキーマへの参照"
+			"description": "Reference to the JSON schema used in this file"
 		}
 	},
 	"additionalProperties": {
 		"type": "string",
 		"enum": ["translated", "partially_translated", "untranslated", "community"],
-		"description": "ページの翻訳状態"
+		"description": "The translation status of the page"
 	}
 }