Starting with the negative bits, to get them out of the way:
- Acceptance rates for international students are much lower than for domestic students, and if you need financial aid they are lower again.
- Acceptance rates for transfer students (student who have finished secondary school and started university) are lower than for students who have not started university yet. In part, that is just numbers: spaces for students in years 2 and 3 are limited to the number of students who leave.
- As a transfer student you need recommendations from teachers yes, and yes, they have to be in English. You, however, can NOT do the translating!
- "Economic University" I'm guessing means a university that focuses on Economics? A US university will have a Department of Economics- the US doesn't really do subject-specific universities. In most universities you apply to the university, not the department (there are exceptions, especially for Computer Sciences, Engineering and Architecture). If you want to continue studying economics, pretty much every university will have an Econ department.