The rules for opening an account can be found at :
The letter from social welfare is a good idea, request a PPS number for her and then inform Revenue you are married an look for her allowances to the transferred to you. I think she will get a Tax Certificate in her name, it will show the split of allowances between the two of you. It is also possible to get bills in both names, so you can ring up the ESB etc and ask to change the name Mr A and Mrs B footcandles.
My wife is also asian and having worked in banks in her own country is amased at them here. AIB cashed a post dated cheque on her last year. When she went to complain they could not care less. She would have been fired if she did it in her bank. BOI think she is a man, but that is another story.
Towger.