Hi guys i heard something about being eligible for joining the U.S army as linguist without green card if you speak some of the critical languages.Is it true and what are those languages
tnx in advance

I'm believe you could work for the Army (or other parts of the Gov) without a green card, but I don't think you can join the military.
Check with a recruiter - they will know for sure.

do you mean that i cant work in any MOS or just those that require security clearance ???

It's been over 20 years since I retired and close to 30 since I was a recruiter, you need to talk to a current recruiter. They will answer your questions.

Which critical languages do you speak?

i speak croatian/serbian/bosnian and italian but if the arent critical i can learn some other language i have 2 yrs

Sorry nixy
But there are many who speak these languages
A critical language would be Pashto or Dari or various Arab /African dialects.

and how about nurse,i also heard if you are nurse licenced to work in usa you can enlist,and when i gain citizenship just change MOS