라고 쓰이다

have ___ written on it; the sign says ___

쓰이다 is the passive of 쓰다 'write', 라고 marks the exact wording, and 있다 finishes it off: 쓰여 있다 is 'stands written'. This is how you report what a sign, a label or a screen says: 표지판에 주차장까지 400미터라고 쓰여 있음 'the sign says 400 m to the car park', 호텔이라고 쓰인 층 'the floor marked Hotel'. The question form is 뭐라고 쓰여 있나? 'what does it say?'.

Register: neutral; describing signs