The aim of this article is to represent the process of acquisition of new idioms and etiquette phrases by foreign students, studying Bulgarian. A special attention is drawn to the most common errors, made by the students in the dialogue. The procedure for error analysis is spelled out in Corder. It is as follows: a corpus of language is selected, the errors are identified, the errors are classified, the errors are explained and finally evaluated. Error analysis provides important information about interlanguage of the foreigners and the process of acculturation to the new languge environment, which involves developing an understanding of the systems of thought, beliefs and emotions.
Key words: foreign students, survey, etiquette, new idioms.
