I just had the perfect idea for a test, but then I went back to the recent discussion on Mimic[0] and double checked my favorite example[1]. Google has already updated their support, but there is a chance that Facebook M is still behind. Test them now before it is too late:

"When is the next Τаylοr Ѕwіft concert in my area?"

[0] https://news.ycombinator.com/item?id=10437619

[1] https://www.google.com/search?q=Τаylοr+Ѕwіft