Aims: The use of social media in generation Y and generation Z as a forum for communication is commonly used in everyday life. The use of language as a means of communication in social media also attracts attention, especially the use of Indonesian, as a national language and as a unifying language of the nation, Indonesian must of course be maintained. Especially in writing and using it. The frequency of writing words on social media often becomes a problem in Indonesian as a national language. Both consciously and unconsciously, Indonesian writing is often found that is not in accordance with the structure of grammar and vocabulary in social media, causing concerns about the use of Indonesian in the future that has strayed far from the general guidelines of Indonesian spelling. Researchers conduct research related to the use of basic words in social media.
Study Design: The analysis process is carried out using an approach that starts from data collection, stemming and grouping data from random social media (WhatsApp, Instagram and Facebook).
Place and Duration of Study: Data from the top 3 (three) social media (WhatsApp, Instagram and Facebook) with the keyword "belajar" between December 2019 and January 2020.
Methodology: From the data collected there were 40492 basic words that were successfully obtained. Then the data obtained is done by sorting and deleting repeated words, so as to get the base word data of 5243 words.
Results: From the results of the study obtained information that the word "ajar" is the most frequent word with 2502 times repeated. The words "yang" and the word "ga" are non-standard words most often appear with the appearance 759 and 530 times. Mistakes most often occur because of abbreviated writing and hypercorrection.
Conclusion: The use of words that are not standard and not in accordance with the general guidelines of Indonesian spelling are words that are dominated by abbreviated words. Abbreviations like "yg" should "yang" rank first, while the word "ga" who should "tidak" rank second. The writing of words caused by hypercorrection is also one of the causes of errors in writing words. Hypercorrection words that appear include "zenius", "coba" and "smoga".