I never experienced this issue of not having the Address in Roman letters. But google translator does transcript it correctly if you copy and paste it there and you can fill in any forms in english. All post offices and postmen can read addresses written in english as well
Back from Phuket Immigration, I was a little afraid they would not accept the forms filled with computer typing, so I filled them with handwriting blue ink. But then I met some fellow expats same age and saw that they had filled the form in advance by typing it but the fonts have to be blue. So thats accepted.
You need 1. Bank letter to confirm the current money of 800k + 2. Bank statement from the past months since opening acc. or visa issued. 3. Updated bank book with a transaction made same day when applying extension and copies of of all pages from bank book as well.
Best is to go to immigration and get the detailed list of all needed documents for EoS based on non O visa. It could vary from province