diff --git a/packages/frontend/src/components/MkUserSetupDialog.Profile.vue b/packages/frontend/src/components/MkUserSetupDialog.Profile.vue
index 9f1bd608f84b..b237cb596b04 100644
--- a/packages/frontend/src/components/MkUserSetupDialog.Profile.vue
+++ b/packages/frontend/src/components/MkUserSetupDialog.Profile.vue
@@ -51,14 +51,11 @@ watch(name, () => {
 		// 空文字列をnullにしたいので??は使うな
 		// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
 		name: name.value || null,
-	}, undefined, null, err => {
-		if (err.code === 'SCREEN_NAME_CONTAINS_PROHIBITED_WORDS') {
-			os.alert({
-				type: 'error',
-				title: i18n.ts.screenNameContainsProhibitedWords,
-				text: i18n.ts.screenNameContainsProhibitedWordsDescription,
-			});
-		}
+	}, undefined, {
+		'0b3f9f6a-2f4d-4b1f-9fb4-49d3a2fd7191': {
+			title: i18n.ts.screenNameContainsProhibitedWords,
+			text: i18n.ts.screenNameContainsProhibitedWordsDescription,
+		},
 	});
 });
 
diff --git a/packages/frontend/src/os.ts b/packages/frontend/src/os.ts
index e1a3e6d0907d..0ff3a31f3bd3 100644
--- a/packages/frontend/src/os.ts
+++ b/packages/frontend/src/os.ts
@@ -35,6 +35,7 @@ export const apiWithDialog = (<E extends keyof Misskey.Endpoints = keyof Misskey
 	endpoint: E,
 	data: P = {} as any,
 	token?: string | null | undefined,
+	customErrors?: Record<string, { title?: string; text: string; }>,
 ) => {
 	const promise = misskeyApi(endpoint, data, token);
 	promiseDialog(promise, null, async (err) => {
@@ -77,6 +78,9 @@ export const apiWithDialog = (<E extends keyof Misskey.Endpoints = keyof Misskey
 		} else if (err.message.startsWith('Unexpected token')) {
 			title = i18n.ts.gotInvalidResponseError;
 			text = i18n.ts.gotInvalidResponseErrorDescription;
+		} else if (customErrors && customErrors[err.id]) {
+			title = customErrors[err.id].title;
+			text = customErrors[err.id].text;
 		}
 		alert({
 			type: 'error',
diff --git a/packages/frontend/src/pages/settings/profile.vue b/packages/frontend/src/pages/settings/profile.vue
index 8939907d9dac..f98edfea9a47 100644
--- a/packages/frontend/src/pages/settings/profile.vue
+++ b/packages/frontend/src/pages/settings/profile.vue
@@ -206,14 +206,11 @@ function save() {
 		lang: profile.lang || null,
 		isBot: !!profile.isBot,
 		isCat: !!profile.isCat,
-	}, undefined, null, err => {
-		if (err.code === 'SCREEN_NAME_CONTAINS_PROHIBITED_WORDS') {
-			os.alert({
-				type: 'error',
-				title: i18n.ts.screenNameContainsProhibitedWords,
-				text: i18n.ts.screenNameContainsProhibitedWordsDescription,
-			});
-		}
+	}, undefined, {
+		'0b3f9f6a-2f4d-4b1f-9fb4-49d3a2fd7191': {
+			title: i18n.ts.screenNameContainsProhibitedWords,
+			text: i18n.ts.screenNameContainsProhibitedWordsDescription,
+		},
 	});
 	globalEvents.emit('requestClearPageCache');
 	claimAchievement('profileFilled');
diff --git a/packages/frontend/src/scripts/get-note-menu.ts b/packages/frontend/src/scripts/get-note-menu.ts
index 4ffa0ab94d2f..c1846b058957 100644
--- a/packages/frontend/src/scripts/get-note-menu.ts
+++ b/packages/frontend/src/scripts/get-note-menu.ts
@@ -245,13 +245,10 @@ export function getNoteMenu(props: {
 	function togglePin(pin: boolean): void {
 		os.apiWithDialog(pin ? 'i/pin' : 'i/unpin', {
 			noteId: appearNote.id,
-		}, undefined, null, res => {
-			if (res.id === '72dab508-c64d-498f-8740-a8eec1ba385a') {
-				os.alert({
-					type: 'error',
-					text: i18n.ts.pinLimitExceeded,
-				});
-			}
+		}, undefined, {
+			'72dab508-c64d-498f-8740-a8eec1ba385a': {
+				text: i18n.ts.pinLimitExceeded,
+			},
 		});
 	}