My girlfriend is on a F1 visa working (OPT) in the US. I am on a E2 visa that was recently renewed for another 3 years. We are planning to get married before her 12 month limit to work in the US expires. What is the process to change from the F1 to a dependent E2? She is not from the same nationality than I am. Is there a way to get her dependent E2 visa in the US or she has to go back to her country and get the visa in the US embassy? What is a prudent time to get everything filed? Thanks!