diff --git a/locales/index.d.ts b/locales/index.d.ts
index d8eb90f4e5..8211827d64 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -11004,6 +11004,40 @@ export interface Locale extends ILocale {
      * Show warning when opening external URLs
      */
     "warnExternalUrl": string;
+    "_flash": {
+        /**
+         * Flash Content Hidden
+         */
+        "contentHidden": string;
+        /**
+         * Powered by Ruffle.
+         */
+        "poweredByRuffle": string;
+        /**
+         * Always be wary of arbitrary code execution!
+         */
+        "arbitraryCodeExecutionWarning": string;
+        /**
+         * Flash Content Failed To Load:
+         */
+        "failedToLoad": string;
+        /**
+         * Flash Content Is Loading
+         */
+        "isLoading": string;
+        /**
+         * Loading Ruffle player
+         */
+        "loadingRufflePlayer": string;
+        /**
+         * Loading Flash file
+         */
+        "loadingFlashFile": string;
+        /**
+         * raw.esm.sh could not be accessed, meaning this instance's Content Security Policy is likely out of date. Please contact your instance administrators.
+         */
+        "cspError": string;
+    };
     "_mfm": {
         /**
          * This is not a widespread feature, it may not display properly on most other fedi software, including other Misskey forks
diff --git a/packages/frontend/src/components/SkFlashPlayer.vue b/packages/frontend/src/components/SkFlashPlayer.vue
index 4d192b20f6..9864120e3e 100644
--- a/packages/frontend/src/components/SkFlashPlayer.vue
+++ b/packages/frontend/src/components/SkFlashPlayer.vue
@@ -14,17 +14,17 @@ SPDX-License-Identifier: AGPL-3.0-only
 <div v-else :class="$style.flash_player_enabled">
 	<div :class="$style.flash_display">
 		<div v-if="playerHide" :class="$style.player_hide" @click="dismissWarning()">
-			<b><i class="ph-eye ph-bold ph-lg"></i> Flash Content Hidden</b>
-			<span>Powered by Ruffle.</span>
-			<span>Always be wary of arbitrary code execution!</span>
+			<b><i class="ph-eye ph-bold ph-lg"></i> {{ i18n.ts._flash.contentHidden }}</b>
+			<span>{{ i18n.ts._flash.poweredByRuffle }}</span>
+			<span>{{ i18n.ts._flash.arbitraryCodeExecutionWarning }}</span>
 			<span>{{ i18n.ts.clickToShow }}</span>
 		</div>
 		<div v-if="ruffleError" :class="$style.player_hide">
-			<b><i class="ph-warning ph-bold ph-lg"></i> Flash Content Failed To Load:</b>
+			<b><i class="ph-warning ph-bold ph-lg"></i> {{ i18n.ts._flash.failedToLoad }}</b>
 			<code>{{ ruffleError }}</code>
 		</div>
 		<div v-else-if="loadingStatus" :class="$style.player_hide">
-			<b>Flash Content Is Loading<MkEllipsis/></b>
+			<b>{{ i18n.ts._flash.isLoading }}<MkEllipsis/></b>
 			<MkLoading/>
 			<p>{{ loadingStatus }}</p>
 		</div>
@@ -100,7 +100,7 @@ function handleError(error: unknown) {
  */
 async function loadRuffle() {
 	if (window.RufflePlayer !== undefined) return;
-	loadingStatus.value = 'Loading Ruffle player';
+	loadingStatus.value = i18n.ts._flash.loadingRufflePlayer;
 	await import('@ruffle-rs/ruffle'); // Assumption: this will throw if esm.sh has a hiccup or something. If not, the next undefined check will catch it.
 	window.RufflePlayer = window.RufflePlayer as PublicAPILike | PublicAPI | undefined; // Assert unknown type due to side effects
 	if (window.RufflePlayer === undefined) throw Error('esm.sh has shit itself, but not in an expected way (has esm.sh permanently shut down? how close is the heat death of the universe?)');
@@ -169,7 +169,7 @@ function createPlayer() {
 function loadContent() {
 	if (player.value === undefined) throw Error('Player is uninitialized.');
 	ruffleContainer.value?.appendChild(player.value);
-	loadingStatus.value = 'Loading Flash file';
+	loadingStatus.value = i18n.ts._flash.loadingFlashFile;
 	player.value.load(url.value).then(() => {
 		loadingStatus.value = undefined;
 	}).catch(error => {
@@ -179,7 +179,7 @@ function loadContent() {
 			handleError(error); // Unexpected error
 		}).catch(() => {
 			// Must be CSP because esm.sh should be online if `loadRuffle()` didn't fail
-			handleError('raw.esm.sh could not be accessed, meaning this instance\'s Content Security Policy is likely out of date. Please contact your instance administrators.');
+			handleError(i18n.ts._flash.cspError);
 		});
 	});
 }
diff --git a/sharkey-locales/en-US.yml b/sharkey-locales/en-US.yml
index 1f9b6ef4f5..75b6fc3537 100644
--- a/sharkey-locales/en-US.yml
+++ b/sharkey-locales/en-US.yml
@@ -156,6 +156,15 @@ allowClickingNotifications: "Allow clicking on pop-up notifications"
 pinnedOnly: "Pinned"
 blockingYou: "Blocking you"
 warnExternalUrl: "Show warning when opening external URLs"
+_flash:
+  contentHidden: "Flash Content Hidden"
+  poweredByRuffle: "Powered by Ruffle."
+  arbitraryCodeExecutionWarning: "Always be wary of arbitrary code execution!"
+  failedToLoad: "Flash Content Failed To Load:"
+  isLoading: "Flash Content Is Loading"
+  loadingRufflePlayer: "Loading Ruffle player"
+  loadingFlashFile: "Loading Flash file"
+  cspError: "raw.esm.sh could not be accessed, meaning this instance's Content Security Policy is likely out of date. Please contact your instance administrators."
 _delivery:
   stop: "Suspend delivery"
   resume: "Resume delivery"
diff --git a/sharkey-locales/ja-JP.yml b/sharkey-locales/ja-JP.yml
index 0977a2e564..22bd5235ca 100644
--- a/sharkey-locales/ja-JP.yml
+++ b/sharkey-locales/ja-JP.yml
@@ -142,6 +142,15 @@ sensitiveMediaRevealConfirm: "センシティブなメディアです。表示
 severAllFollowRelations: "以下の関係をすべて断ち切る"
 severAllFollowRelationsConfirm: "すべての人間関係を壊す？これは不可逆です！これは{instanceName}の{followingCount}フォローと{followersCount}フォロワーの関係を壊す！"
 severAllFollowRelationsQueued: "キューに入れられた{host}とのすべてのフォロー関係を切断する。"
+_flash:
+  contentHidden: "Flashコンテンツ非表示"
+  poweredByRuffle: "Powered by Ruffle." # Doesn't need a translation, apparently.
+  arbitraryCodeExecutionWarning: "任意コード実行にご注意！"
+  failedToLoad: "Flashコンテンツ読込に失敗"
+  isLoading: "Flashコンテンツ読込中"
+  loadingRufflePlayer: "Ruffleプレイヤー読込中"
+  loadingFlashFile: "Flashファイル読込中"
+  cspError: "raw.esm.shにアクセスできませんでした。このサーバーのコンテンツセキュリティポリシー(CSP) が廃止されている可能性があり、サーバー管理者に連絡してください。"
 _delivery:
   stop: "配信停止"
   resume: "配信再開"