By all means get the new passport if possible. Even if she becomes an American citizen and gets a US passport then she will need to use her Colombian passport when entering Colombia. It's pretty easy to get a Colombian passport if you have a consulate nearby, but you will need an appointment. Frankly, they want to see the passport to see the legal entrance to the US as well as the date listed, and the visa that is part of the pages.
Colombian passport expired
in US Citizenship General Discussion
Posted · Edited by Arty Clough
Mistook location
By all means get the new passport if possible. Even if she becomes an American citizen and gets a US passport then she will need to use her Colombian passport when entering Colombia. It's pretty easy to get a Colombian passport if you have a consulate nearby, but you will need an appointment. Frankly, they want to see the passport to see the legal entrance to the US as well as the date listed, and the visa that is part of the pages.