Many users are working in international corporations and getting notifications their watches with different signs characteristic to other alphabets.
In my case I am using European watch and getting many notifications with mixed alphabet signs. Messages are in English and Korean. English words are displayed correctly but Korean ones are like � for every sign.
It does not look good and because Garmin devices are able to buy in APAC version it should be possible to display all characters in other market devices also.
I reported it also here so you can vote for it to make it more important (I hope)
forums.garmin.com/.../more-alphabet-signs-in-notifications-for-european-watches