Berlitz Korea flags "discuss about" as a common error

Preply lists articles and prepositions as ongoing trouble spots for learners, and this fits the pattern exactly. "Discuss" takes a direct object without "about," so the added preposition alters register and can shift nuance in Task 2 or professional writing. Even with new slang lists circulating, structures like this stay fixed once corrected and directly support Band 8 criteria on grammatical range.