Translation of substratum in German

There are about fifty families who are having very tight connections. Too tight in my opinion. It's like a small town in this aspect. Joanna though is very satisfied with the place and the atmosphere.
Unfortunately, it is a natural and eternal phenomenon of human beings. Whereever people have been, it appeared too. Please let me define racism in my next email to you and please share also your thoughts.
I liked the vocabulary builder, which is actually a complementary product to our online vocabulary builder. A lot of people ask me about whether Vocabulix is available for download, and at this time it is not.