Insults:

From The book Uglier than a Monkey's Armpit (I will not add all the insults, so you can read it from the experts!)
In the folders you will see some commonly used insults in the languages specified. And, I will add some code (some of the insults not from the book).

Insults in German:

is.gd/LiaLy3

Insults in Danish:

bit.ly/390fYnj

Insults in Swedish:

tinyurl.com/y2h65f9e

Insults in French:

is.gd/gvt98v

Insults in Japanese:

is.gd/Warmduscher_repo_Japanese

The random insult generator:

is.gd/random_insult_generator