Languages are constantly evolving. The differences between the language used by the Vikings, the speech of the inhabitants of medieval Stockholm, and today's citizens of Sweden can be significant. When studying the history of the Swedish language, it is difficult to assess whether the selected text is from the "old" or "new" era. Will ML .NET cope with this task of text classification as well as professional linguists at universities? Let's see! This talk includes live coding and partially covers a theory behind machine learning.