In the applied translation "پرطرفدار" means "popular" emphasizing on the multitude of people using or advocating something. However "trend" means "The general course, tendency, or drift (of action, thought, etc.)" which perfectly matches the word "رایج" that literally mean "current" and "prevailing". Also it is 4 letters shorter.

Applied translation has a bit long characters. There are way better Persian Synonyms that we can use. "محبوب" is a synonym persian word that its synonyms in English are "beloved", "Favorite" or "Popular". "محبوب" is more related to rest of them. Although others are not wrong,