The spelling "deutsch" is the word German in German. The noun form is Deutsche (German man, plural Deutschen).
und is and in German
The German word for Why is Varrum
The German word for how is wie.
mien
zu
Ich
sind
Wo.
The German word for "book" is "Buch"
The German word for war is Krieg.
At can be translated as an, bei or auf in German.