It is possible to somehow fill the database data as soon as all applications will be loaded.
I explain the problem. It is necessary that the default database was an urgent data for the entire project, in my case, tags, level of accounts and professions.
To resolve this problem, I created the necessary commands. For example, for tags that command is "create_tags" (called so ./manage.py create_tags). It creates all the necessary tags for all other objects: articles, questions, answers, snippets and so.
The question is next, how to run it once as soon as Django will be able to fill these databases.