Created second languages, second religions, exposed Eastern (Oriental) culture to Western (Occidental) culture(s).
2nd religion, 2nd language, exposure to the culture ruling over it.
butt
they were homeless.
Indochina
The only country in southeast Asia that was not fully absorbed by one or another European empires was Thailand. Japan also avoided that fate, but Japan is in east Asia, not Southeast Asia.
Japan
Great Britain
Buddhism, Hinduism and Islam are practiced throughout Southeast Asia
France and Britain; although Britain concentrated more on southern and southwest asia.
Hinduism and Buddhism affected Southeast Asia, by introducing the two new cultures to Asia.
For the most part they opposed it. Some of the wealthy connected individuals may have supported it.
Myanmar