Spouse means husband or wife, if you are not married then she/he is your partner. Your partner will need to apply for a DTV themselves, and you or they apply for DTV for your child as a dependent. If it is not safe for you to go to the interview you would not be issued a DTV, possibly a 6-month tourist visa. You should also consider applying elsewhere due to your safety concerns attending an in-person interview
Anonymous participant You have a DTV so cannot get a work permit. You are likely not liable to be paying tax in Thailand with the DTV. Other DTVERS have also been told they can not get a tax ID from the tax office.
Vietnam seems to be busy, several others in similar situation as yourself. Your application has been under process for 9 business days; it can take up to 15 business days.
All applications are submitted online. If you apply via Laos you pay in person and have a brief interview once they assess your application. Both are good embassies to apply from. The letter should include length of treatment, the number of visits