The same problem with 2.2.1.5 release.
I have tested for SQL Server for both russian and english browser settings.
All the rest initial data is created in english in any case.
I tried to debug.
The text is successfully extracted from template files and even stored in the database, but for some reason not showed by HtmlContent module.
After the initial data is created when I try to edit the empty content, new record appears in mp_HtmlContent table (!), but the record created with initial data is not altered. The difference is in ItemID, SortOrder (100 for initial and 500 for new record), UserID (1 for initial and -1 for new) and in publishing dates.
I hope this information can help.