diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 59ce5ee84f..b3279d78b8 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -746,6 +746,7 @@ notRecommended: "非推奨"
 botProtection: "Botプロテクション"
 instanceBlocking: "インスタンスブロック"
 selectAccount: "アカウントを選択"
+switchAccount: "アカウントを切り替え"
 enabled: "有効"
 disabled: "無効"
 quickAction: "クイックアクション"
diff --git a/packages/client/src/components/post-form.vue b/packages/client/src/components/post-form.vue
index a016df7e0b..0dcec26932 100644
--- a/packages/client/src/components/post-form.vue
+++ b/packages/client/src/components/post-form.vue
@@ -8,28 +8,28 @@
 >
 	<header>
 		<button v-if="!fixed" class="cancel _button" @click="cancel"><i class="fas fa-times"></i></button>
-		<button v-click-anime class="account _button" @click="openAccountMenu">
+		<button v-click-anime v-tooltip="i18n.locale.switchAccount" class="account _button" @click="openAccountMenu">
 			<MkAvatar :user="postAccount ?? $i" class="avatar"/>
 		</button>
 		<div>
 			<span class="text-count" :class="{ over: textLength > maxTextLength }">{{ maxTextLength - textLength }}</span>
 			<span v-if="localOnly" class="local-only"><i class="fas fa-biohazard"></i></span>
-			<button ref="visibilityButton" v-tooltip="$ts.visibility" class="_button visibility" :disabled="channel != null" @click="setVisibility">
+			<button ref="visibilityButton" v-tooltip="i18n.locale.visibility" class="_button visibility" :disabled="channel != null" @click="setVisibility">
 				<span v-if="visibility === 'public'"><i class="fas fa-globe"></i></span>
 				<span v-if="visibility === 'home'"><i class="fas fa-home"></i></span>
 				<span v-if="visibility === 'followers'"><i class="fas fa-unlock"></i></span>
 				<span v-if="visibility === 'specified'"><i class="fas fa-envelope"></i></span>
 			</button>
-			<button v-tooltip="$ts.previewNoteText" class="_button preview" :class="{ active: showPreview }" @click="showPreview = !showPreview"><i class="fas fa-file-code"></i></button>
+			<button v-tooltip="i18n.locale.previewNoteText" class="_button preview" :class="{ active: showPreview }" @click="showPreview = !showPreview"><i class="fas fa-file-code"></i></button>
 			<button class="submit _buttonGradate" :disabled="!canPost" data-cy-open-post-form-submit @click="post">{{ submitText }}<i :class="reply ? 'fas fa-reply' : renote ? 'fas fa-quote-right' : 'fas fa-paper-plane'"></i></button>
 		</div>
 	</header>
 	<div class="form" :class="{ fixed }">
 		<XNoteSimple v-if="reply" class="preview" :note="reply"/>
 		<XNoteSimple v-if="renote" class="preview" :note="renote"/>
-		<div v-if="quoteId" class="with-quote"><i class="fas fa-quote-left"></i> {{ $ts.quoteAttached }}<button @click="quoteId = null"><i class="fas fa-times"></i></button></div>
+		<div v-if="quoteId" class="with-quote"><i class="fas fa-quote-left"></i> {{ i18n.locale.quoteAttached }}<button @click="quoteId = null"><i class="fas fa-times"></i></button></div>
 		<div v-if="visibility === 'specified'" class="to-specified">
-			<span style="margin-right: 8px;">{{ $ts.recipient }}</span>
+			<span style="margin-right: 8px;">{{ i18n.locale.recipient }}</span>
 			<div class="visibleUsers">
 				<span v-for="u in visibleUsers" :key="u.id">
 					<MkAcct :user="u"/>
@@ -38,21 +38,21 @@
 				<button class="_buttonPrimary" @click="addVisibleUser"><i class="fas fa-plus fa-fw"></i></button>
 			</div>
 		</div>
-		<MkInfo v-if="hasNotSpecifiedMentions" warn class="hasNotSpecifiedMentions">{{ $ts.notSpecifiedMentionWarning }} - <button class="_textButton" @click="addMissingMention()">{{ $ts.add }}</button></MkInfo>
-		<input v-show="useCw" ref="cwInputEl" v-model="cw" class="cw" :placeholder="$ts.annotation" @keydown="onKeydown">
+		<MkInfo v-if="hasNotSpecifiedMentions" warn class="hasNotSpecifiedMentions">{{ i18n.locale.notSpecifiedMentionWarning }} - <button class="_textButton" @click="addMissingMention()">{{ i18n.locale.add }}</button></MkInfo>
+		<input v-show="useCw" ref="cwInputEl" v-model="cw" class="cw" :placeholder="i18n.locale.annotation" @keydown="onKeydown">
 		<textarea ref="textareaEl" v-model="text" class="text" :class="{ withCw: useCw }" :disabled="posting" :placeholder="placeholder" data-cy-post-form-text @keydown="onKeydown" @paste="onPaste" @compositionupdate="onCompositionUpdate" @compositionend="onCompositionEnd"/>
-		<input v-show="withHashtags" ref="hashtagsInputEl" v-model="hashtags" class="hashtags" :placeholder="$ts.hashtags" list="hashtags">
+		<input v-show="withHashtags" ref="hashtagsInputEl" v-model="hashtags" class="hashtags" :placeholder="i18n.locale.hashtags" list="hashtags">
 		<XPostFormAttaches class="attaches" :files="files" @updated="updateFiles" @detach="detachFile" @changeSensitive="updateFileSensitive" @changeName="updateFileName"/>
 		<XPollEditor v-if="poll" :poll="poll" @destroyed="poll = null" @updated="onPollUpdate"/>
 		<XNotePreview v-if="showPreview" class="preview" :text="text"/>
 		<footer>
-			<button v-tooltip="$ts.attachFile" class="_button" @click="chooseFileFrom"><i class="fas fa-photo-video"></i></button>
-			<button v-tooltip="$ts.poll" class="_button" :class="{ active: poll }" @click="togglePoll"><i class="fas fa-poll-h"></i></button>
-			<button v-tooltip="$ts.useCw" class="_button" :class="{ active: useCw }" @click="useCw = !useCw"><i class="fas fa-eye-slash"></i></button>
-			<button v-tooltip="$ts.mention" class="_button" @click="insertMention"><i class="fas fa-at"></i></button>
-			<button v-tooltip="$ts.hashtags" class="_button" :class="{ active: withHashtags }" @click="withHashtags = !withHashtags"><i class="fas fa-hashtag"></i></button>
-			<button v-tooltip="$ts.emoji" class="_button" @click="insertEmoji"><i class="fas fa-laugh-squint"></i></button>
-			<button v-if="postFormActions.length > 0" v-tooltip="$ts.plugin" class="_button" @click="showActions"><i class="fas fa-plug"></i></button>
+			<button v-tooltip="i18n.locale.attachFile" class="_button" @click="chooseFileFrom"><i class="fas fa-photo-video"></i></button>
+			<button v-tooltip="i18n.locale.poll" class="_button" :class="{ active: poll }" @click="togglePoll"><i class="fas fa-poll-h"></i></button>
+			<button v-tooltip="i18n.locale.useCw" class="_button" :class="{ active: useCw }" @click="useCw = !useCw"><i class="fas fa-eye-slash"></i></button>
+			<button v-tooltip="i18n.locale.mention" class="_button" @click="insertMention"><i class="fas fa-at"></i></button>
+			<button v-tooltip="i18n.locale.hashtags" class="_button" :class="{ active: withHashtags }" @click="withHashtags = !withHashtags"><i class="fas fa-hashtag"></i></button>
+			<button v-tooltip="i18n.locale.emoji" class="_button" @click="insertEmoji"><i class="fas fa-laugh-squint"></i></button>
+			<button v-if="postFormActions.length > 0" v-tooltip="i18n.locale.plugin" class="_button" @click="showActions"><i class="fas fa-plug"></i></button>
 		</footer>
 		<datalist id="hashtags">
 			<option v-for="hashtag in recentHashtags" :key="hashtag" :value="hashtag"/>