UNHCR = UN High Commission for Refugees.
They DO offer (unpaid) internships:
http://www.unhcr.de/unhcr/jobs-und-business/praktika.html
You know that State Department offers scholarships for critical needs languages?
http://exchanges.state.gov/us/program/critical-language-scholarship-program
Fulbright offers Teaching English as a Foreign Language scholarship
http://www.cies.org/article/fulbright-tefl-opportunities
CIEE also offers teaching ESL overseas.
So does Peace Corps
http://www.peacecorps.gov/volunteer/learn/whatvol/edu_youth/<
ROTC scholarships:
http://www.goarmy.com/rotc/scholarships.html
http://www.nrotc.navy.mil/scholarships.aspx
https://www.afrotc.com/scholarships/
CIA scholarships:
https://www.cia.gov/careers/student-opportunities/undergraduate-scholarship-program.html
CIA Student Internships
https://www.cia.gov/careers/student-opportunities
Please note: for your own safety (and your family’s) do not apply for anything CIA or NSA outside of the continental United States.
NSA does hire linguists but is looking for computer specialists.
https://www.nsa.gov/careers/opportunities_4_u/students/undergraduate/iasp1.shtml
Note also that Peace Corps and CIA are mutually exclusive. Doing one basically makes it impossible for you to do the other.
US Institutes for Peace is not, so far as I know, incompatible with any of the various services.
http://www.usip.org/grants-fellowships
US Aid Internships:
https://www.usaid.gov/work-usaid/careers/student-internships
State Department Internships *ONLY OPEN TO *STUDENTS*! so it is “now or never”.
http://careers.state.gov/intern
UN Volunteers:
http://www.unv.org/how-to-volunteer.html
State Department Volunteers:
http://www.state.gov/m/fsi/tc/79984.htm
DAAD
https://www.daad.org/undergradprograms
Program search engine:
https://www.daad.de/deutschland/studienangebote/studiengang/en/
Study in Germany
https://www.study-in.de/en/index.php
Please note: if you are an unpaid student intern and impoverished you can and should apply for food stamps and get free food from food banks such as red cross, city, county, salvation army. I try to be practical.
Basically you should focus on developing as many useful skills and talents as you can: making yourself useful to other people just about always works. You want to be a technical expert and have good people skills (“soft skills”).