Browser: 2345 Browser (Chrome 47.0.2526.108)
The layout is not fine when switching to Chinese interface on the top right corner.
But curiously, after clicking the notification button, the layout turns alright. But things will be not well after opening a new page again.
I noticed that changing the text "提醒 (0条)" in
<a href="/wiki/Special:Notifications" class="mw-echo-notifications-badge mw-echo-notification-badge-nojs mw-echo-notifications-badge-all-read" data-counter-num="0" data-counter-text="0" title="您的提醒">提醒 (0条)</a>
into English do affect the layout.