diff --git a/locales/en-US.yml b/locales/en-US.yml
index 13ddcc4b5c..f04d82d378 100644
--- a/locales/en-US.yml
+++ b/locales/en-US.yml
@@ -184,7 +184,7 @@ flagAsBotDescription: "Enable this option if this account is controlled by a pro
 flagAsCat: "Mark this account as a cat"
 flagAsCatDescription: "Enable this option to mark this account as a cat."
 flagSpeakAsCat: "Speak as a cat"
-flagSpeakAsCatDescription: "Your posts will get nyanified when in cat mode."
+flagSpeakAsCatDescription: "Your posts will get nyanified when in cat mode. If this isnt working please check that you dont have 'Disable cat speak' on under General/Note Display"
 flagShowTimelineReplies: "Show replies in timeline"
 flagShowTimelineRepliesDescription: "Shows replies of users to notes of other users in the timeline if turned on."
 autoAcceptFollowed: "Automatically approve follow requests from users you're following"
@@ -1103,6 +1103,7 @@ letsLookAtTimeline: "Have a look at the timeline"
 disableFederationConfirm: "Really disable federation?"
 disableFederationConfirmWarn: "Even if defederated, posts will continue to be public unless set otherwise. You usually do not need to do this."
 disableFederationOk: "Disable"
+disableCatSpeak: "Disable cat speak"
 invitationRequiredToRegister: "This instance is invite-only. You must enter a valid invite code sign up."
 approvalRequiredToRegister: "This instance is only accepting users who specify a reason for registration."
 emailNotSupported: "This instance does not support sending emails"
diff --git a/locales/index.d.ts b/locales/index.d.ts
index 0239da7071..f53436e62e 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -4429,6 +4429,10 @@ export interface Locale extends ILocale {
      * 連合なしにする
      */
     "disableFederationOk": string;
+    /**
+     * 猫の話し方を無効にする
+     */
+    "disableCatSpeak": string;
     /**
      * 現在このサーバーは招待制です。招待コードをお持ちの方のみ登録できます。
      */
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index caed03910f..210e3b2935 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -1103,6 +1103,7 @@ letsLookAtTimeline: "タイムラインを見てみる"
 disableFederationConfirm: "連合なしにしますか？"
 disableFederationConfirmWarn: "連合なしにしても投稿は非公開になりません。ほとんどの場合、連合なしにする必要はありません。"
 disableFederationOk: "連合なしにする"
+disableCatSpeak: "猫の話し方を無効にする"
 invitationRequiredToRegister: "現在このサーバーは招待制です。招待コードをお持ちの方のみ登録できます。"
 approvalRequiredToRegister: "現在このサーバーは承認制です。参加したい理由を記入し、承認された方のみ登録できます。"
 emailNotSupported: "このサーバーではメール配信はサポートされていません"
diff --git a/packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts b/packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts
index a3a2b9f319..f42e8b1e80 100644
--- a/packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts
+++ b/packages/frontend/src/components/global/MkMisskeyFlavoredMarkdown.ts
@@ -89,6 +89,8 @@ export default function (props: MfmProps, { emit }: { emit: SetupContext<MfmEven
 	 * @param disableNyaize Whether nyaize is disabled or not
 	 */
 	const genEl = (ast: mfm.MfmNode[], scale: number, disableNyaize = false) => ast.map((token): VNode | string | (VNode | string)[] => {
+		if (defaultStore.state.disableCatSpeak)
+			disableNyaize = true
 		switch (token.type) {
 			case 'text': {
 				let text = token.props.text.replace(/(\r\n|\n|\r)/g, '\n');
diff --git a/packages/frontend/src/pages/settings/general.vue b/packages/frontend/src/pages/settings/general.vue
index 637c1b24b9..8cd1caf6bd 100644
--- a/packages/frontend/src/pages/settings/general.vue
+++ b/packages/frontend/src/pages/settings/general.vue
@@ -68,6 +68,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<MkSwitch v-model="showGapBetweenNotesInTimeline">{{ i18n.ts.showGapBetweenNotesInTimeline }}</MkSwitch>
 				<MkSwitch v-model="loadRawImages">{{ i18n.ts.loadRawImages }}</MkSwitch>
 				<MkSwitch v-model="showTickerOnReplies">{{ i18n.ts.showTickerOnReplies }}</MkSwitch>
+				<MkSwitch v-model="disableCatSpeak">{{ i18n.ts.disableCatSpeak }}</MkSwitch>
 				<MkSelect v-model="searchEngine" placeholder="Other">
 					<template #label>{{ i18n.ts.searchEngine }}</template>
 					<option
@@ -400,6 +401,7 @@ const disableShowingAnimatedImages = computed(defaultStore.makeGetterSetter('dis
 const forceShowAds = computed(defaultStore.makeGetterSetter('forceShowAds'));
 const oneko = computed(defaultStore.makeGetterSetter('oneko'));
 const loadRawImages = computed(defaultStore.makeGetterSetter('loadRawImages'));
+const disableCatSpeak = computed(defaultStore.makeGetterSetter('disableCatSpeak'));
 const highlightSensitiveMedia = computed(defaultStore.makeGetterSetter('highlightSensitiveMedia'));
 const imageNewTab = computed(defaultStore.makeGetterSetter('imageNewTab'));
 const enableFaviconNotificationDot = computed(defaultStore.makeGetterSetter('enableFaviconNotificationDot'));
diff --git a/packages/frontend/src/store.ts b/packages/frontend/src/store.ts
index dda320dbac..fea85e409f 100644
--- a/packages/frontend/src/store.ts
+++ b/packages/frontend/src/store.ts
@@ -288,6 +288,10 @@ export const defaultStore = markRaw(new Storage('base', {
 		where: 'device',
 		default: window.matchMedia('(prefers-reduced-motion)').matches,
 	},
+	disableCatSpeak: {
+		where: 'device',
+		default: false,
+	},
 	emojiStyle: {
 		where: 'device',
 		default: 'twemoji', // twemoji / fluentEmoji / native