diff --git a/locales/en-US.yml b/locales/en-US.yml
index 23884aa043..b469b312a5 100644
--- a/locales/en-US.yml
+++ b/locales/en-US.yml
@@ -754,7 +754,7 @@ alwaysMarkSensitive: "Mark as sensitive by default"
 loadRawImages: "Load original images instead of showing thumbnails"
 searchEngine: "Search Engine For Search MFM"
 searchEngineOther: "Other"
-searchEngineCustomURIDescription: "The custom URI must be input in the format like \"https://www.google.com/search?q={query}\" or \"https://www.google.com/search?q=%s\"."
+searchEngineCustomURIDescription: "The custom URI must be input in the format like \"https://www.google.com/search?q=\\{query}\" or \"https://www.google.com/search?q=%s\"."
 searchEngineCusomURI: "Custom URI"
 disableShowingAnimatedImages: "Don't play animated images"
 highlightSensitiveMedia: "Highlight sensitive media"
diff --git a/locales/generateDTS.js b/locales/generateDTS.js
index 49807144ec..a175247445 100644
--- a/locales/generateDTS.js
+++ b/locales/generateDTS.js
@@ -6,7 +6,10 @@ import ts from 'typescript';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
-const parameterRegExp = /\{(\w+)\}/g;
+// braces preceded by backslashes are literal, they don't represent
+// parameters; they get cleaned up by `locales/index.js` before
+// getting shipped to the browser
+const parameterRegExp = /(?<!\\)\{(\w+)\}/g;
 
 function createMemberType(item) {
 	if (typeof item !== 'string') {
diff --git a/locales/index.d.ts b/locales/index.d.ts
index fe36e2dfd0..34a8c07924 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -3029,9 +3029,9 @@ export interface Locale extends ILocale {
      */
     "searchEngineOther": string;
     /**
-     * カスタム URI は、"https://www.google.com/search?q={query}" や "https://www.google.com/search?q=%s" のような形式で入力する必要があります。
+     * カスタム URI は、"https://www.google.com/search?q=\{query}" や "https://www.google.com/search?q=%s" のような形式で入力する必要があります。
      */
-    "searchEngineCustomURIDescription": ParameterizedString<"query">;
+    "searchEngineCustomURIDescription": string;
     /**
      * カスタム URI
      */
diff --git a/locales/index.js b/locales/index.js
index 650e552337..c7a693fb77 100644
--- a/locales/index.js
+++ b/locales/index.js
@@ -49,7 +49,11 @@ const primaries = {
 };
 
 // 何故か文字列にバックスペース文字が混入することがあり、YAMLが壊れるので取り除く
-const clean = (text) => text.replace(new RegExp(String.fromCodePoint(0x08), 'g'), '');
+//
+// also, we remove the backslashes in front of open braces (the
+// backslashes are only needed to tell `generateDTS.js` that the
+// braces do not represent parameters)
+const clean = (text) => text.replace(new RegExp(String.fromCodePoint(0x08), 'g'), '').replaceAll(new RegExp(/\\+\{/,'g'), '{');
 
 export function build() {
 	const locales = languages.reduce((a, c) => (a[c] = yaml.load(clean(fs.readFileSync(new URL(`${c}.yml`, import.meta.url), 'utf-8'))) || {}, a), {});
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 293f8ec380..8c0ef3d55f 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -753,7 +753,7 @@ alwaysMarkSensitive: "デフォルトでメディアをセンシティブ設定
 loadRawImages: "添付画像のサムネイルをオリジナル画質にする"
 searchEngine: "検索MFMの検索エンジン"
 searchEngineOther: "他"
-searchEngineCustomURIDescription: "カスタム URI は、\"https://www.google.com/search?q={query}\" や \"https://www.google.com/search?q=%s\" のような形式で入力する必要があります。"
+searchEngineCustomURIDescription: "カスタム URI は、\"https://www.google.com/search?q=\\{query}\" や \"https://www.google.com/search?q=%s\" のような形式で入力する必要があります。"
 searchEngineCusomURI: "カスタム URI"
 disableShowingAnimatedImages: "アニメーション画像を再生しない"
 highlightSensitiveMedia: "メディアがセンシティブであることを分かりやすく表示"