Join Date: Feb 2008
Location: Memphis (Midtown)
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You need to find out if all three countries tolerate multiple citizenships. They need not promote it, tolerance is sufficient. I know that GB does (you mentioned English) and have heard that Mexiko does, too. You could get in touch with the Argentinian consulate or embassy and ask about "multiple citizenship per birth". Actually, I would just apply for a passport for the child - if it doesn't have the right the passport will be denied (and sometimes when the person DOES have the right). Make sure not to say "aquire citizenship" because that sounds like a naturalization process which falls under completely different laws. Be prepared for incorrect information! Even at embassies, I have received completely wrong information.
Again, you are not applying for your children's citizenship or "gaining" citizenship. This is something they have a right to per birth, you are just doing the correct paperwork.
BTW, I would never dare decide which citizenship is more or less important. It will be up to my child to decide this. It is my duty as a parent to take care of my child's business and not to judge.