The book deals with unusual sound systems (such as ancient African click languages), strange grammars (the classification of all things in Thai), strange vocabulary (the language of the Japanese tea ceremony), strange counting systems (various twenties systems), languages changing according to social relations (the Khmer with its many ways of saying "I"), special sacral languages (for example to communicate with the ancestors), enigmatic scriptures such as Glagolitic, and constructed languages such as Esperanto and Klingon. Many of these languages seem strange from the perspective of the German language.The German language, with its unique nested sentences, is also attracting the attention of the internationally renowned language researcher.