Imitheos, thank you very much!
wsfontload -N myfont font.file
wsconsctl -dw font=myfont
That works just fine. The text is displayed correctly with the "cat" command.
Perhaps some adjustments should be made concerning the "vi" editor, because the text is seen in the form of "\x030\x031...". Or is there another tool that makes console editing of non-English text more convenient?