But, there are some English words that I discovered that should be avoided.
In German, the word "after" means anus! So, do not be surprised if you get dirty looks at the local store if you ask where to find the aftershave. Also, no one will be interested in seeing your before and after pictures! And, don't fire up the afterburners! It's safe to say that any phrase using the word "after" should be avoided unless you want giggles or disappointed looks.
In German, the word "mist" mean shit! Although it's not a commonly used English word, it can still create awkward situations if used. For example, Mist is the brand name of a soda in The United States. But, the last thing you'd want to do at a restaurant here is ask for a can of Mist! The only thing worse than the giggles or disappointed looks you might get, would be someone taking you up on your request!
In German, the word "latte" means wooden plank. This might seem innocent enough, but when added to words Morgen or Morning, it takes on a whole new meaning. So, be very careful how you order your coffee here! It's rather easy to accidentally ask for extra foam with your morning erection! Fortunately (or, unfortunately depending on how you look at it) Germans have a good sense of humor about this one. It's not uncommon to find a "morning latte" on the menu of your local coffee shop... Just don't be surprised if your cup of joe has a rather graphic pictures scribbled on it.