HOW TO: Avoid Translation Gaffes - A Few Simple Do's And Don'ts
Avoid the temptation to give your translation to your foreign language-speaking pal ... and then crossing your fingers that it will be ok. It usually isn't.
Be wary of language enthusiasts and amateurs.
If, say, your employee wants to impress you with his/her language skills, be assertive in declining, if you want to avoid getting into gruesome situations of the kind portrayed in the Catherine Tate sketch "The Interpreter".