Same situation for me. Living in Taiwan on an APRC, Filipina wife, and she was recently approved for a B2 tourist visa. Bring your marriage contract to the interview for supporting documents
During the interview the important thing for them is to be sure that she will come back to Taiwan.
Glad to know your wife was successful with her application. Can I ask if you’re a US citizen? Did you need to do anything to certify the marriage contract for AIT to accept it?
I am a US citizen, yes. We were married first in the Philippines, where we had to have the marriage contract translated and authenticated (by the DFA, then TECO). After that we got married in Taiwan.