Using the simplest form, and sometimes the broken down version of a language, to communicate. Though not to be confused with the indoor voice, phone voice, child-speaking voice, and/or cave-man voice; the immigrant voice specializes in utilizing basic nouns and verbs to communicate a need or want.
Phone Voice - "Sally, that was delicious! I can't believe it's not butter!"
Immigrant Voice - "Yes, very good." Accompanied by a smile and a head nod of approval
Phone Voice - "Excuse me miss, can you show me where the restrooms are?"
Immigrant Voice - "Hi smile, restroom?"