I like how "twaalf" is intermediate between German "zwölf" and English "twelve".
All three are of a common origin, my friend. Going further back, even Russian, Hindi, Persian, Greek, and all of the Romance languages come from the same language, which we call Proto-Indo-European.
You're right except for the Arabic language which (alongside Hebrew, Aramaic, Ancient Egyptian, etc.) belongs to the Afroasiatic family.
I wrote "the kid reads twelve books" and it told me I was wrong with the correct answer being "the kid reads twelve12 books"