Wenn Ihr in Malaysia beantragt, dann werdet ihr wohl beglaubigte Übersetzungen benötigen. Ich würde es eher riskieren es über ein Konsulat in Deutschland zu probieren - wenn ihr dort noch gemeldet seid.
First of all: unless you are US American or open a very special business via BOI, you cannot fully „own“ any business. You can own a 49% share in a business with Thai partners holding the rest. There are ways (preferential shares) to still remain in control as a minority shareholder - though gray area. Having said that: in order to legally work even for your (co-) owned company, you would need to switch to a business visa and get a work permit. But you would only get a work permit for „your“ company, if that company has 2 million baht of nominal capital and 4 Thai employees hired for every foreigner with a work permit (including yourself).
Unless you are US American or establish a special BOI company: the ration is 49% foreigner and 51% Thai. You need at least 3 people / parties. There are ways to still remain in control via preferential shares. But gray area.
Great overview. Curious: It mentions there that the DTV application must be made at the consulate or the country of (remote) employment. I am not sure that is correct. So far it seemed that the DTV application must be made from wherever the applicant is based at the time of application.
Stern typical Thai: Vastly different requirements between offices of the very same institution. Good preparation for life in Thailand where people muddle their way through shopping for more favorable conditions amongst offices of the very same institution. Little big bosses in uniforms make their own interpretations - likely cause they have to.
Currently Thai consulates around the world handle this vastly differently. While some seem to issue a DTV based off of only a short cooking class appointment, others require at least a 1 or 3 months course. Typical Thai style. Even their own consulates aren’t properly informed. Good training for life in Thailand where people muddle their way through and shop for the most favorable conditions amongst offices of the very same organization - same happens with local immigration offices, departments of land transport, etc. TIT. Sorry for these honest words.