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 (Forerunner 945) 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.