Bro don't listen to this forum people too much. Especially when people claimed that if a VB can speak English or mandarin, she can't be his gf. Mean he trying to say that there's no educated speaking English ladies in Vietnam?
One who can converse in English fluently doesn't mean she is a whore. Probably she received her education outside of her country, and hence she can speak English quite well. But oh well, he only can get girl via paying viet dongs. So he very particular if a girl who can converse in English fluently.
If you read back many of his past posts are nonsense. Therefore you see his no of postings.
Ultimately it's your life. And I wish you have a bliss marriages with your future Wife.
Anyway about the 10 fingerprints, they just wanna to have your Wife profile being recorded in their system. So next time once scan her passport upon entry, all record will be shown, I.e how many times she entered Sg.
If you already ROM, then just bring the letter of ROM, to smoothen her process with the ICA at the airport, in case they ask her, why she frequently come and visit Sg. She can just say that she visiting her future Husband to be and in laws and also preparing for the up coming wedding.
You should apply pre marriage Long term visit pass.
https://www.ica.gov.sg/page.aspx?pageid=541