Is it possible that this union is formed by the peoples of the countries who speak Indo-European languages? These peoples certainly share a huge cultural similarity, some of them have preserved the original Indo-European culture better than others, and it is possible for other ones to explore the roots of their traditions from them.
After this long time, many things have been forgotten and we can revive them by forming this cultural union, we can research about those things which are common among us to identify the influences of other cultures on our original culture.
If you look at dictionaries then you will find that some words in different Indo-European languages are almost the same, for example about the words which begin with "N" we see Na (No), Nau (New), Nama/Noma (Name), Nu (Now), ... it shows for some reasons some things have not been changed, I think we should preserve our ancient culture, and it is better that we use other Indo-European words, instead of using non-Indo-European ones, for example from 1400 years ago, Persians also use Arabic word "Esm" for "Name", it would be better to use English Name, if Old Persian Nama was forgotten.