using Greek lyrics imported in midi files

The MIDI import panel has not yet been restored to MS4.

But MS4 has no trouble in displaying lyrics in Greek - see attached fragment of a file which I transribed from manuscript.

I managed to find an online version of the classical Greek. But I had to copy-and-paste the Greek text syllable by syllable, because of hyphenation problems. You might use that as a slow solution, or perhaps see whether MS4 allows you to copy a longer text (with spaces and hyphens where necessary) from your clipboard direct into your score.

[EDIT]
" how to import a midi file that contains Greek characters in the lyrics?"
I think that the honest answer is: do not use MIDI as an import method. MusicXML is a much better format, because it preserves musical notation including lyrics. MIDI really only understands sounds and their pitch and duration!