Indonesian Language for Foreign Speakers (BIPA) is Indonesian language learning intended for foreigners. The aim of this research was to examine the vocabulary, terminologies, and grammar used by BIPA students with the corpus linguistics application, Kortara. This research was conducted at Fatoni University and Yale University with 51 BIPA students. This research used a mixed-methods approach, comprising the quantitative method that was used in the early stage of research to obtain the research data and the qualitative method for the analysis process. The research results showed dominant mastery of vocabulary by BIPA students, mostly nouns, verbs, adverbs, pronouns, and adjectives. There were 11 vocabularies with the highest frequency. Based on the results of the analysis, effective and efficient vocabulary learning principles and techniques were structured for BIPA students as an introduction to word types and variations of word formation in the Indonesian language.