diff --git a/src/client/app/admin/views/charts.vue b/src/client/app/admin/views/charts.vue
index 2c42aa438..f70e7c207 100644
--- a/src/client/app/admin/views/charts.vue
+++ b/src/client/app/admin/views/charts.vue
@@ -3,27 +3,27 @@
 	<header>
 		<b><fa :icon="['far', 'chart-bar']"/> {{ $t('title') }}:</b>
 		<select v-model="src">
-			<optgroup :label="$t('label')">
+			<optgroup :label="$t('federation')">
 				<option value="federation-instances">{{ $t('charts.federation-instances') }}</option>
 				<option value="federation-instances-total">{{ $t('charts.federation-instances-total') }}</option>
 			</optgroup>
-			<optgroup :label="$t('label')">
+			<optgroup :label="$t('users')">
 				<option value="users">{{ $t('charts.users') }}</option>
 				<option value="users-total">{{ $t('charts.users-total') }}</option>
 			</optgroup>
-			<optgroup :label="$t('label')">
+			<optgroup :label="$t('notes')">
 				<option value="notes">{{ $t('charts.notes') }}</option>
 				<option value="local-notes">{{ $t('charts.local-notes') }}</option>
 				<option value="remote-notes">{{ $t('charts.remote-notes') }}</option>
 				<option value="notes-total">{{ $t('charts.notes-total') }}</option>
 			</optgroup>
-			<optgroup :label="$t('label')">
+			<optgroup :label="$t('drive')">
 				<option value="drive-files">{{ $t('charts.drive-files') }}</option>
 				<option value="drive-files-total">{{ $t('charts.drive-files-total') }}</option>
 				<option value="drive">{{ $t('charts.drive') }}</option>
 				<option value="drive-total">{{ $t('charts.drive-total') }}</option>
 			</optgroup>
-			<optgroup :label="$t('label')">
+			<optgroup :label="$t('network')">
 				<option value="network-requests">{{ $t('charts.network-requests') }}</option>
 				<option value="network-time">{{ $t('charts.network-time') }}</option>
 				<option value="network-usage">{{ $t('charts.network-usage') }}</option>
diff --git a/src/client/app/common/views/components/games/reversi/reversi.room.vue b/src/client/app/common/views/components/games/reversi/reversi.room.vue
index 693d2de95..92cdc6c08 100644
--- a/src/client/app/common/views/components/games/reversi/reversi.room.vue
+++ b/src/client/app/common/views/components/games/reversi/reversi.room.vue
@@ -7,9 +7,9 @@
 
 		<div class="card map">
 			<header>
-				<select v-model="mapName" :placeholder="$t('placeholder')" @change="onMapChange">
+				<select v-model="mapName" :placeholder="$t('choose-map')" @change="onMapChange">
 					<option label="-Custom-" :value="mapName" v-if="mapName == '-Custom-'"/>
-					<option :label="$t('label')" :value="null"/>
+					<option :label="$t('random')" :value="null"/>
 					<optgroup v-for="c in mapCategories" :key="c" :label="c">
 						<option v-for="m in maps" v-if="m.category == c" :key="m.name" :label="m.name" :value="m.name">{{ m.name }}</option>
 					</optgroup>
diff --git a/src/client/app/common/views/components/messaging-room.form.vue b/src/client/app/common/views/components/messaging-room.form.vue
index 7c45df47d..d25c0c86d 100644
--- a/src/client/app/common/views/components/messaging-room.form.vue
+++ b/src/client/app/common/views/components/messaging-room.form.vue
@@ -8,7 +8,7 @@
 		ref="textarea"
 		@keypress="onKeypress"
 		@paste="onPaste"
-		:placeholder="$t('placeholder')"
+		:placeholder="$t('input-message-here')"
 		v-autocomplete="'text'"
 	></textarea>
 	<div class="file" @click="file = null" v-if="file">{{ file.name }}</div>
diff --git a/src/client/app/common/views/components/messaging.vue b/src/client/app/common/views/components/messaging.vue
index 046ac1cfd..3bfaea81f 100644
--- a/src/client/app/common/views/components/messaging.vue
+++ b/src/client/app/common/views/components/messaging.vue
@@ -3,7 +3,7 @@
 	<div class="search" v-if="!compact" :style="{ top: headerTop + 'px' }">
 		<div class="form">
 			<label for="search-input"><i><fa icon="search"/></i></label>
-			<input v-model="q" type="search" @input="search" @keydown="onSearchKeydown" :placeholder="$t('placeholder')"/>
+			<input v-model="q" type="search" @input="search" @keydown="onSearchKeydown" :placeholder="$t('search-user')"/>
 		</div>
 		<div class="result">
 			<ol class="users" v-if="result.length > 0" ref="searchResult">
diff --git a/src/client/app/common/views/components/theme.vue b/src/client/app/common/views/components/theme.vue
index 31abef1d2..4a6d066d7 100644
--- a/src/client/app/common/views/components/theme.vue
+++ b/src/client/app/common/views/components/theme.vue
@@ -2,11 +2,11 @@
 <div class="nicnklzforebnpfgasiypmpdaaglujqm">
 	<label>
 		<span>{{ $t('light-theme') }}</span>
-		<ui-select v-model="light" :placeholder="$t('placeholder')">
-			<optgroup :label="$t('label')">
+		<ui-select v-model="light" :placeholder="$t('light-theme')">
+			<optgroup :label="$t('light-themes')">
 				<option v-for="x in lightThemes" :value="x.id" :key="x.id">{{ x.name }}</option>
 			</optgroup>
-			<optgroup :label="$t('label')">
+			<optgroup :label="$t('dark-themes')">
 				<option v-for="x in darkThemes" :value="x.id" :key="x.id">{{ x.name }}</option>
 			</optgroup>
 		</ui-select>
@@ -14,11 +14,11 @@
 
 	<label>
 		<span>{{ $t('dark-theme') }}</span>
-		<ui-select v-model="dark" :placeholder="$t('placeholder')">
-			<optgroup :label="$t('label')">
+		<ui-select v-model="dark" :placeholder="$t('dark-theme')">
+			<optgroup :label="$t('dark-themes')">
 				<option v-for="x in darkThemes" :value="x.id" :key="x.id">{{ x.name }}</option>
 			</optgroup>
-			<optgroup :label="$t('label')">
+			<optgroup :label="$t('light-themes')">
 				<option v-for="x in lightThemes" :value="x.id" :key="x.id">{{ x.name }}</option>
 			</optgroup>
 		</ui-select>
@@ -68,14 +68,14 @@
 
 	<details>
 		<summary><fa icon="folder-open"/> {{ $t('manage-themes') }}</summary>
-		<ui-select v-model="selectedThemeId" :placeholder="$t('placeholder')">
-			<optgroup :label="$t('label')">
+		<ui-select v-model="selectedThemeId" :placeholder="$t('select-theme')">
+			<optgroup :label="$t('builtin-themes')">
 				<option v-for="x in builtinThemes" :value="x.id" :key="x.id">{{ x.name }}</option>
 			</optgroup>
-			<optgroup :label="$t('label')">
+			<optgroup :label="$t('my-themes')">
 				<option v-for="x in installedThemes.filter(t => t.author == this.$store.state.i.username)" :value="x.id" :key="x.id">{{ x.name }}</option>
 			</optgroup>
-			<optgroup :label="$t('label')">
+			<optgroup :label="$t('installed-themes')">
 				<option v-for="x in installedThemes.filter(t => t.author != this.$store.state.i.username)" :value="x.id" :key="x.id">{{ x.name }}</option>
 			</optgroup>
 		</ui-select>
diff --git a/src/client/app/desktop/views/components/post-form.vue b/src/client/app/desktop/views/components/post-form.vue
index 0af8a63ae..d4be1d8b2 100644
--- a/src/client/app/desktop/views/components/post-form.vue
+++ b/src/client/app/desktop/views/components/post-form.vue
@@ -14,7 +14,7 @@
 			<b>{{ $t('recent-tags') }}:</b>
 			<a v-for="tag in recentHashtags.slice(0, 5)" @click="addTag(tag)" :title="$t('click-to-tagging')">#{{ tag }}</a>
 		</div>
-		<input v-show="useCw" v-model="cw" :placeholder="$t('placeholder')">
+		<input v-show="useCw" v-model="cw" :placeholder="$t('annotations')">
 		<textarea :class="{ with: (files.length != 0 || poll) }"
 			ref="text" v-model="text" :disabled="posting"
 			@keydown="onKeydown" @paste="onPaste" :placeholder="placeholder"
diff --git a/src/client/app/desktop/views/components/settings.vue b/src/client/app/desktop/views/components/settings.vue
index 001928813..f834e8430 100644
--- a/src/client/app/desktop/views/components/settings.vue
+++ b/src/client/app/desktop/views/components/settings.vue
@@ -155,12 +155,12 @@
 		<ui-card class="web" v-show="page == 'web'">
 			<div slot="title"><fa icon="language"/> {{ $t('language') }}</div>
 			<section class="fit-top">
-				<ui-select v-model="lang" :placeholder="$t('placeholder')">
-					<optgroup :label="$t('label')">
+				<ui-select v-model="lang" :placeholder="$t('pick-language')">
+					<optgroup :label="$t('recommended')">
 						<option value="">{{ $t('auto') }}</option>
 					</optgroup>
 
-					<optgroup :label="$t('label')">
+					<optgroup :label="$t('specify-language')">
 						<option v-for="x in langs" :value="x[0]" :key="x[0]">{{ x[1] }}</option>
 					</optgroup>
 				</ui-select>
diff --git a/src/client/app/dev/views/new-app.vue b/src/client/app/dev/views/new-app.vue
index 298b6f992..d8c128904 100644
--- a/src/client/app/dev/views/new-app.vue
+++ b/src/client/app/dev/views/new-app.vue
@@ -2,13 +2,13 @@
 <mk-ui>
 	<b-card :header="$t('header')">
 		<b-form @submit.prevent="onSubmit" autocomplete="off">
-			<b-form-group :label="$t('label')" :description="$t('description')">
+			<b-form-group :label="$t('app-name')" :description="$t('description')">
 				<b-form-input v-model="name" type="text" :placeholder="$t('placeholder')" autocomplete="off" required/>
 			</b-form-group>
-			<b-form-group :label="$t('label')" :description="$t('description')">
+			<b-form-group :label="$t('app-overview')" :description="$t('description')">
 				<b-textarea v-model="description" :placeholder="$t('placeholder')" autocomplete="off" required></b-textarea>
 			</b-form-group>
-			<b-form-group :label="$t('label')" :description="$t('description')">
+			<b-form-group :label="$t('callback-url')" :description="$t('description')">
 				<b-input v-model="cb" type="url" placeholder="ex) https://your.app.example.com/callback.php" autocomplete="off"/>
 			</b-form-group>
 			<b-card :header="$t('header')">
diff --git a/src/client/app/mobile/views/components/post-form.vue b/src/client/app/mobile/views/components/post-form.vue
index 832914357..b1914d4af 100644
--- a/src/client/app/mobile/views/components/post-form.vue
+++ b/src/client/app/mobile/views/components/post-form.vue
@@ -4,7 +4,7 @@
 		<header>
 			<button class="cancel" @click="cancel"><fa icon="times"/></button>
 			<div>
-				<span class="text-count" :class="{ over: trimmedLength(text) > this.maxNoteTextLength }">{{ this.maxNoteTextLength - trimmedLength(text) }}</span>
+				<span class="text-count" :class="{ over: trimmedLength(text) > maxNoteTextLength }">{{ maxNoteTextLength - trimmedLength(text) }}</span>
 				<span class="geo" v-if="geo"><fa icon="map-marker-alt"/></span>
 				<button class="submit" :disabled="!canPost" @click="post">{{ submitText }}</button>
 			</div>
@@ -16,7 +16,7 @@
 				<span v-for="u in visibleUsers">{{ u | userName }}<a @click="removeVisibleUser(u)">[x]</a></span>
 				<a @click="addVisibleUser">+{{ $t('add-visible-user') }}</a>
 			</div>
-			<input v-show="useCw" v-model="cw" :placeholder="$t('placeholder')">
+			<input v-show="useCw" v-model="cw" :placeholder="$t('annotations')">
 			<textarea v-model="text" ref="text" :disabled="posting" :placeholder="placeholder" v-autocomplete="'text'"></textarea>
 			<div class="attaches" v-show="files.length != 0">
 				<x-draggable class="files" :list="files" :options="{ animation: 150 }">
diff --git a/src/client/app/mobile/views/pages/settings.vue b/src/client/app/mobile/views/pages/settings.vue
index 68dd9bfbb..1158e4509 100644
--- a/src/client/app/mobile/views/pages/settings.vue
+++ b/src/client/app/mobile/views/pages/settings.vue
@@ -100,12 +100,12 @@
 				<div slot="title"><fa icon="language"/> {{ $t('lang') }}</div>
 
 				<section class="fit-top">
-					<ui-select v-model="lang" :placeholder="$t('placeholder')">
-						<optgroup :label="$t('label')">
+					<ui-select v-model="lang" :placeholder="$t('auto')">
+						<optgroup :label="$t('recommended')">
 							<option value="">{{ $t('auto') }}</option>
 						</optgroup>
 
-						<optgroup :label="$t('label')">
+						<optgroup :label="$t('specify-language')">
 							<option v-for="x in langs" :value="x[0]" :key="x[0]">{{ x[1] }}</option>
 						</optgroup>
 					</ui-select>