Just saying - we have done this process as described, and the offices concerned send the Certificate on to each other at the appropriate stage. It took about six weeks altogether. May be a little delayed in current circumstances, and we didn't need it translated (two years ago).
The ask:thailand community, consisting of multiple Q/A groups with over 100,000 members, powers this platform. It is not an official government resource. Our members actively contribute to this resource, and while we strive for accuracy, we cannot guarantee its complete reliability. Assistance to travelers is provided as a community service.