AFAIK this depends on the language, your Garmin unit is set.
When i use German as menu, i get Thai map, when i set English i get English map.
Mine is a Nuvi 3770 with thai firmware, bought in BKK
Device Language, not spoken language, mine speaks Bavarian dialect with me
Originally Posted by smokefree
As hudriwudri said, select English in the Language Menu of your device. If English is not offered as an option, use either Garmin WebUpdater or Garmin Express to update the language files on your device.
Thanks for kindly reply from hudriwudri and smokefree