Danger of not knowing a foreign language

I am not sure if the above picture has been doctored but taking it at face value, it shows the disadvantage of using a foreign language without knowing what it actually means.

Locally, even an English-educated Chinese may face a similar problem if he asked a Chinese-educated person to write Chinese characters for him. But it is quite common to have a Chinese-educated sign writer to write English or Malay and made major errors without realising it. Don't believe me, just read a few signs on commercial vehicles and you are likely to spot some.