diff --git a/locales/en.json b/locales/en.json
index ea6ae5b7d6..9963ec60a4 100644
--- a/locales/en.json
+++ b/locales/en.json
@@ -1,3 +1,23 @@
 {
-	"home": "Home"
+	"common": {
+		"time": {
+			"unknown": "unknown",
+			"future": "future",
+			"just_now": "just now",
+			"seconds_ago": "{}s ago",
+			"minutes_ago": "{}m ago",
+			"hours_ago": "{}h ago",
+			"days_ago": "{}d ago",
+			"weeks_ago": "{}weeks ago",
+			"months_ago": "{}months ago",
+			"years_ago": "{}years ago"
+		}
+	},
+	"desktop": {
+		"tags": {
+			"mk-ui-header-nav": {
+				"home": "Home"
+			}
+		}
+	}
 }
diff --git a/locales/ja.json b/locales/ja.json
index 7a7f3a2d02..c4bb930dbc 100644
--- a/locales/ja.json
+++ b/locales/ja.json
@@ -1,3 +1,23 @@
 {
-	"home": "ホーム"
+	"common": {
+		"time": {
+			"unknown": "なぞのじかん",
+			"future": "未来",
+			"just_now": "たった今",
+			"seconds_ago": "{}秒前",
+			"minutes_ago": "{}分前",
+			"hours_ago": "{}時間前",
+			"days_ago": "{}日前",
+			"weeks_ago": "{}週間前",
+			"months_ago": "{}ヶ月前",
+			"years_ago": "{}年前"
+		}
+	},
+	"desktop": {
+		"tags": {
+			"mk-ui-header-nav": {
+				"home": "ホーム"
+			}
+		}
+	}
 }
diff --git a/src/web/app/common/tags/time.tag b/src/web/app/common/tags/time.tag
index b4e6dcdbd3..b0d7d24533 100644
--- a/src/web/app/common/tags/time.tag
+++ b/src/web/app/common/tags/time.tag
@@ -34,16 +34,16 @@
 			const now = new Date();
 			const ago = (now - this.time) / 1000/*ms*/;
 			this.relative =
-				ago >= 31536000 ? ~~(ago / 31536000) + '年前' :
-				ago >= 2592000  ? ~~(ago / 2592000)  + 'ヶ月前' :
-				ago >= 604800   ? ~~(ago / 604800)   + '週間前' :
-				ago >= 86400    ? ~~(ago / 86400)    + '日前' :
-				ago >= 3600     ? ~~(ago / 3600)     + '時間前' :
-				ago >= 60       ? ~~(ago / 60)       + '分前' :
-				ago >= 10       ? ~~(ago % 60)       + '秒前' :
-				ago >= 0        ?                      'たった今' :
-				ago <  0        ?                      '未来' :
-				                                       'なぞのじかん';
+				ago >= 31536000 ? '%i18n:common.time.years_ago%'  .replace('{}', ~~(ago / 31536000)) :
+				ago >= 2592000  ? '%i18n:common.time.months_ago%' .replace('{}', ~~(ago / 2592000)) :
+				ago >= 604800   ? '%i18n:common.time.weeks_ago%'  .replace('{}', ~~(ago / 604800)) :
+				ago >= 86400    ? '%i18n:common.time.days_ago%'   .replace('{}', ~~(ago / 86400)) :
+				ago >= 3600     ? '%i18n:common.time.hours_ago%'  .replace('{}', ~~(ago / 3600)) :
+				ago >= 60       ? '%i18n:common.time.minutes_ago%'.replace('{}', ~~(ago / 60)) :
+				ago >= 10       ? '%i18n:common.time.seconds_ago%'.replace('{}', ~~(ago % 60)) :
+				ago >= 0        ? '%i18n:common.time.just_now%' :
+				ago <  0        ? '%i18n:common.time.future%' :
+				'%i18n:common.time.unknown%';
 			this.update();
 		};
 	</script>
diff --git a/src/web/app/desktop/tags/ui-header-nav.tag b/src/web/app/desktop/tags/ui-header-nav.tag
index 5ffa392f5c..2fb0f8c513 100644
--- a/src/web/app/desktop/tags/ui-header-nav.tag
+++ b/src/web/app/desktop/tags/ui-header-nav.tag
@@ -3,7 +3,7 @@
 		<li class="home { active: page == 'home' }">
 			<a href={ CONFIG.url }>
 				<i class="fa fa-home"></i>
-				<p>'i18n:home'</p>
+				<p>%i18n:desktop.tags.mk-ui-header-nav.home%</p>
 			</a>
 		</li>
 		<li class="messaging">
diff --git a/webpack.config.ts b/webpack.config.ts
index 2fc8ce8a1f..1300d2c9ee 100644
--- a/webpack.config.ts
+++ b/webpack.config.ts
@@ -30,11 +30,11 @@ module.exports = (Object as any).entries(languages).map(([lang, locale]) => {
 			rules: [
 				{
 					enforce: 'pre',
-					test: /\.*$/,
+					test: /\.(tag|js)$/,
 					exclude: /node_modules/,
 					loader: StringReplacePlugin.replace({
 						replacements: [
-							{ pattern: /'i18n:(.+?)'/g, replacement: (_, text) => locale[text] }
+							{ pattern: /%i18n:(.+?)%/g, replacement: (_, text) => eval('locale' + text.split('.').map(x => `['${x}']`).join('')) }
 						]
 					})
 				},