When Bilingualism Goes Horribly Wrong

This was seen on a Welsh/English road sign outside of Cardiff:

English: Cyclists Dismount

Welsh: Llid y Bledren Dymchwelyd

So what? It's just that llid y bledren dymchwelyd translates into English as "bladder disease has returned."

The Welsh Road Works Department has said that it is welcoming applications from anyone interested in the position of translator.