IRAs and citizenship and retiring abroad

[Guest mungbeans]

Hello

My wife and I are both US residents but non US citizens. I'm thinking of opening an IRA and Spousal IRA (both non Roth) and wanted to check if there are any ramifications of non being a US citizen?

I just read something that said US Citizens must cash in a Roth IRA if they retire abroad, so I was wondering if there are other rules US Citzenship versus non Citizenship

- Firstly, can we, as US Residents but non US Citizens, open and contribute to an IRA?

- If we create an IRA then later move abroad to work can we still continue to contribute to the IRAs?

- If we retire abroad and have a non Roth IRA what is the situation?

THanks