The phrase "interests fall" is correct and usable in written English.
You can use it when talking about a decrease in general interest level in something or someone. For example, "At this rate our interest in the project will soon fall off."
Western interests fall, with the symbolic sinking (probably due to sabotage) of the Queen Elizabeth in Hong Kong's harbour; Prince Charles sails over its wreck in 1997 as he and the British leave the colony to new rulers described by the prince as "appalling old waxworks".
His research interests fall into the broad areas of communication theory, wireless communications, and statistical signal processing.
It has ideals, interests and allies whose interests fall in line with its own for a time.
Before applying to M.D.-Ph.D. programs, you also need to decide under which broad discipline your interests fall: Biomedical sciences?
Her research and professional interests fall at the intersection of poverty, gender, and inequality.
Price's interests fell between traditionally defined disciplines.
For now, the suspicion is that vested interests – falling back on the easy line that "it's not about structures" – put paid to an enormously promising experiment.
Most people belong with a certain clique simply because they are being themselves and their unique personalities and interests falls into that stereotype.
The institute's areas of interest fall within "crowded fields," he admits, but they offer "some novel niches".
The 6 million-user app invested in launching a free cryptocurrency trading exchange early this year only to see coin prices plummet and mainstream interest fall off.
But interest fell like an orc beneath a bastard sword.
