As bigbear3764 mentioned, we are in the same boat as the UK since we use the UK English voices for TTS in South Africa. The “St.” will be correctly pronounced as Saint anywhere in a street name, and the same would typically go for “Dr.” vs “Dr” for Doctor and Drive.
Just for interest, the original UK Announcement and discussion is at TTS (text to speech)-new implemented rule, UK and a recently started one for Ireland is at Text-to-speech for “street” and “saint”.
P.S. Welcome to the SA Forums. If you have any other questions or problems, feel free to contact us here or drop a PM. In the meantime, can I suggest that you also take a look at the Wiki and Editing guidelines as per the links in my signature. There is a wealth of info in there, mainly intended to make your life easier.
Regards
Carel