“en tramite” just means in process, you get a piece of paper saying you have applied for you paper/citizenship or whatever so you are not at that time under the obligations of a tourist visa/temporary visa or whatever.
Take a look at the link above, it tells you what you need to do. Since you applied outside the country, get the documents and apply in the country you may get two citizenships

When you make application they give you a paper saying you have applied (en tramite), keep it with your passport.