Germany has an excellent and efficient public transportation system and if you are planning on visiting or even moving to Germany, you should familiarize yourself with the public transportation system in your city. Here are some phrases and vocabulary.
Idioms exist in every language. Some are unique to one specific language, others have very similar equivalents in other languages. Here are some English idioms and their equivalents in different languages.
You can learn the meaning of German interjections just like you would learn any other vocabulary, but they are a bit different. Here is a list of some common German interjections and phrases and what they mean.