Mine was the same as yours (see attached image). It was authorised, no need to change language or anything else complicated. Call your insurance company to change the wording on the cover note.
A friend of mine (from Norway) was successful in obtaining an STV by submitting a letter of invitation from their Thai girlfriend. The letter supplied included her address and phone number only. The letter was very brief.
I'm day 6 now. No joy with the phone numbers either. Had a friend in Thailand call on my behalf and they were informed that the officials were dealing with those arriving on
*****
th Jan.
I am wondering if the delay is due in part to my insurance being from the UK and not the usual package insurance sold to placate the application process therefore it needs to be manually looked at as this process should be automatic more or less.
Those being manually checked will obviously be done during office hourse so by the time Europe/UK day time comes around the office hours in Thailand are almost done for the day so chances of making contact are very slim to none.
Either way this is frustrating and the days between now and departure are getting less ...
The fact the laws may not be enforced particularly effectively is another matter. At the end of the day it's illegal, it's your decision if you want to get fined or ultimately deported if you happen to meet the wrong or right law enforcement officer.