diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index b94fea1dad..c3a9848b72 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -1079,6 +1079,8 @@ admin/views/instance.vue:
   instance-name: "インスタンス名"
   instance-description: "インスタンスの紹介"
   banner-url: "バナー画像URL"
+  languages: "インスタンスの対象言語"
+  languages-desc: "スペースで区切って複数設定できます。"
   maintainer-config: "管理者情報"
   maintainer-name: "管理者名"
   maintainer-email: "管理者の連絡先"
diff --git a/src/client/app/admin/views/instance.vue b/src/client/app/admin/views/instance.vue
index 9d0204cfb8..815cea6313 100644
--- a/src/client/app/admin/views/instance.vue
+++ b/src/client/app/admin/views/instance.vue
@@ -6,6 +6,7 @@
 			<ui-input v-model="name">%i18n:@instance-name%</ui-input>
 			<ui-textarea v-model="description">%i18n:@instance-description%</ui-textarea>
 			<ui-input v-model="bannerUrl"><i slot="icon"><fa icon="link"/></i>%i18n:@banner-url%</ui-input>
+			<ui-input v-model="languages"><i slot="icon"><fa icon="language"/></i>%i18n:@languages%<span slot="desc">%i18n:@languages-desc%</span></ui-input>
 		</section>
 		<section class="fit-bottom">
 			<header><fa icon="headset"/> %i18n:@maintainer-config%</header>
@@ -31,7 +32,7 @@
 		<section>
 			<header><fa icon="ghost"/> %i18n:@proxy-account-config%</header>
 			<ui-info>%i18n:@proxy-account-info%</ui-info>
-			<ui-input v-model="proxyAccount"><i slot="prefix">@</i>%i18n:@proxy-account-username%<span slot="desc">%i18n:@proxy-account-username-desc%</span></ui-input>
+			<ui-input v-model="proxyAccount"><span slot="prefix">@</span>%i18n:@proxy-account-username%<span slot="desc">%i18n:@proxy-account-username-desc%</span></ui-input>
 			<ui-info warn>%i18n:@proxy-account-warn%</ui-info>
 		</section>
 		<section>
@@ -68,6 +69,7 @@ export default Vue.extend({
 			bannerUrl: null,
 			name: null,
 			description: null,
+			languages: null,
 			cacheRemoteFiles: false,
 			localDriveCapacityMb: null,
 			remoteDriveCapacityMb: null,
@@ -87,6 +89,7 @@ export default Vue.extend({
 			this.bannerUrl = meta.bannerUrl;
 			this.name = meta.name;
 			this.description = meta.description;
+			this.languages = meta.langs.join(' ');
 			this.cacheRemoteFiles = meta.cacheRemoteFiles;
 			this.localDriveCapacityMb = meta.driveCapacityPerLocalUserMb;
 			this.remoteDriveCapacityMb = meta.driveCapacityPerRemoteUserMb;
@@ -119,6 +122,7 @@ export default Vue.extend({
 				bannerUrl: this.bannerUrl,
 				name: this.name,
 				description: this.description,
+				langs: this.languages.split(' '),
 				cacheRemoteFiles: this.cacheRemoteFiles,
 				localDriveCapacityMb: parseInt(this.localDriveCapacityMb, 10),
 				remoteDriveCapacityMb: parseInt(this.remoteDriveCapacityMb, 10),
diff --git a/src/misc/fetch-meta.ts b/src/misc/fetch-meta.ts
index fde244d1cc..e8ff1aca7c 100644
--- a/src/misc/fetch-meta.ts
+++ b/src/misc/fetch-meta.ts
@@ -2,6 +2,7 @@ import Meta, { IMeta } from '../models/meta';
 
 const defaultMeta: any = {
 	name: 'Misskey',
+	langs: [],
 	cacheRemoteFiles: true,
 	localDriveCapacityMb: 256,
 	remoteDriveCapacityMb: 8,
diff --git a/src/models/meta.ts b/src/models/meta.ts
index 8d3a917dfb..f62117a0ba 100644
--- a/src/models/meta.ts
+++ b/src/models/meta.ts
@@ -119,6 +119,8 @@ export type IMeta = {
 		email?: string;
 	};
 
+	langs?: string[];
+
 	broadcasts?: any[];
 
 	stats?: {
diff --git a/src/server/api/endpoints/admin/update-meta.ts b/src/server/api/endpoints/admin/update-meta.ts
index bcfa420ed8..d45a8759f2 100644
--- a/src/server/api/endpoints/admin/update-meta.ts
+++ b/src/server/api/endpoints/admin/update-meta.ts
@@ -130,6 +130,13 @@ export const meta = {
 			desc: {
 				'ja-JP': 'インスタンス管理者の連絡先メールアドレス'
 			}
+		},
+
+		langs: {
+			validator: $.arr($.str).optional,
+			desc: {
+				'ja-JP': 'インスタンスの対象言語'
+			}
 		}
 	}
 };
@@ -205,6 +212,10 @@ export default define(meta, (ps) => new Promise(async (res, rej) => {
 		set['maintainer.email'] = ps.maintainerEmail;
 	}
 
+	if (ps.langs !== undefined) {
+		set.langs = ps.langs;
+	}
+
 	await Meta.update({}, {
 		$set: set
 	}, { upsert: true });
diff --git a/src/server/api/endpoints/meta.ts b/src/server/api/endpoints/meta.ts
index 311e3d6692..625a9519d7 100644
--- a/src/server/api/endpoints/meta.ts
+++ b/src/server/api/endpoints/meta.ts
@@ -43,6 +43,7 @@ export default define(meta, (ps, me) => new Promise(async (res, rej) => {
 
 		name: instance.name,
 		description: instance.description,
+		langs: instance.langs,
 
 		secure: config.https != null,
 		machine: os.hostname(),