My mom has dementia and has reverted back to her native language of Romanian. She forgets she speaks English and the places I looked into to relocate her keep telling me that once she is not able to speak English anymore or wont speak English when prompted they will not be able to keep her. So I feel like I am living under a gun and don't know what to do with her once she is kicked out. I am afraid she will be kicked out.
She's not the only elder who has Romanian as her mother tongue, she is likely to revert to it as the disease progresses, and it IS important that she be able to communicate for as long as possible.
(alternately, find if any nursing homes or board & care homes in the area have 1-2 Romanian-speaking staff).
If she is currently in a nursing home, then no, she can't be "kicked out" solely because of a language barrier. Contact the social worker/Director of Nursing at the facility she is in and ask them how they plan to address your mother's communication issues as her dementia/Alzheimer's progresses. What are they telling you?
I would also like to recognize you for attempting to find a place for your mother; from which you mother will not have to move. Moving is so very hard on the elderly.
Plus if she lives in a metro area, all large hospitals can direct the facility to interpreters that Assisted Living/Nursing homes can use.