The study explores the impact of the Arabizi phenomenon on English writing by Arab English Learners. Due to the popularity of social networks, Arab students combine Roman numbers and letters to produce a new writing code with unconventional rules. The study is significant because most researchers studied the impact of Arabizi on the Arabic language. In contrast, this study focused on the effect of Arabizi on English writing by Arab learners. The study sample consisted of twenty sophomore female students majoring in the English language at one of the Jordanian governmental universities. The main research questions are how Arabizi affects English writing and the justification behind the continuity of this new writing code. The researcher analysed samples of the intervention of Arabizi on writing in English to answer the first question. To answer the second question, the researcher interviewed the sample members to investigate the reasons for the continuity of this new writing code. The study results concluded that not all English foreign language learners use Arabizi, while others use it regularly for several reasons, although it affects their English writing. By the end of the study, the researcher presents recommendations for linguists and English language teachers.