Kesalahan berbahasa tataran morfologi pada laman berita masih banyak dijumpai, khususnya pada laman Kompasiana. Padahal laman tersebut dibaca oleh cukup banyak orang. Tentu ini akan berpengaruh pada kemampuan pembaca dalam berbahasa Indonesia yang baik dan benar. Oleh karena itu penelitian ini bertujuan untuk menganalisis kesalahan berbahasa dan pembenarannya pada tataran morfologi. Sumber data dalam penelitian ini adalah laman artikel Kompasiana yang diterbitkan pada bulan November 2021. Penelitian ini menggunakan metode deskriptif kualitatif. Pengumpulan data yang digunakan menggunakan teknik simak catat serta analisis data. Teknik analisis data berupa reduksi data, sajian data dan penarikan simpulan. Hasil dari penelitian ini menunjukkan bahwa kesalahan dalam tataran morfologi paling banyak ditemukan pada afiksasi yang belum sesuai PUEBI dan penulisan kata baku yang belum mengacu Kamus Besar Bahasa Indonesia. Adapun hasil data menunjukkan setidaknya terdapat tujuh kesalahan afikasasi dan enam kesalahan penggunaan kata baku. Kesalahan afiksasi yang banyak ditemukan adalah penggunaan me(N), dan kan. Kesalahan penulisan kata baku yang banyak ditemukan adalah penggunaan di sebagai kata depan dan awalan.

Culture as the basis of speech acts can encourage the speaker and the listener to realize their goals in communication activities. The reasons are that culture can make listeners want to hear more about the speaker's information, can be media for listeners to illustrate the implicature, and can make them respond quickly. However, no specific research describes the culture, implicature, and response in the illocutionary speech acts to realize the effectiveness of communication. Based on this problem, it is important to do further research. The first purpose is to describe the illocutionary speech acts in Ustaz Salim A. Fillah's lecture video, especially in the Culture edition. The second purpose is to describe how culture, as part of illocutionary speech acts to realize the effectiveness of communication. The research used a descriptive qualitative method. The analysis data technique refers to the four simultaneous processes by Miles, Huberman, and Saldana, which consist of data collection, data reduction, data display, and conclusion. Speech acts are found to consist of assertive (identification, prediction, or description), directive (invocation, suggestion, or instruction), commissive (something is a must be conducted), expressive (expression of feeling), and declarative (acknowledgment of status or condition). All of those speech acts can make listeners want to hear more information, to be media to illustrate the implicature, and make them easier to remember the utterance of Ustaz Salim A. Fillah speech acts.

Culture as the basis of speech acts can encourage the speaker and the listener to realize their goals in communication activities. The reasons are that culture can make listeners want to hear more about the speaker's information, can be media for listeners to illustrate the implicature, and can make them respond quickly. However, no specific research describes the culture, implicature, and response in the illocutionary speech acts to realize the effectiveness of communication. Based on this problem, it is important to do further research. The first purpose is to describe the illocutionary speech acts in Ustaz Salim A. Fillah's lecture video, especially in the Culture edition. The second purpose is to describe how culture, as part of illocutionary speech acts to realize the effectiveness of communication. The research used a descriptive qualitative method. The analysis data technique refers to the four simultaneous processes by Miles, Huberman, and Saldana, which consist of data collection, data reduction, data display, and conclusion. Speech acts are found to consist of assertive (identification, prediction, or description), directive (invocation, suggestion, or instruction), commissive (something is a must be conducted), expressive (expression of feeling), and declarative (acknowledgment of status or condition). All of those speech acts can make listeners want to hear more information, to be media to illustrate the implicature, and make them easier to remember the utterance of Ustaz Salim A. Fillah speech acts.