Back in 2005 or so, I recall my American colleagues also saying they were paid every 2 weeks, instead of monthly. That seemed pretty strange to me, for salaried positions.
It varies by employer, to this day. ADP (biggest HR company in the world, likely) probably still pays its employees every two weeks, but I no longer work there. My current company is on the twice-a-month schedule. I've been paid monthly in past jobs. And my wife is currently getting paid once a quarter!
Paid every 2 weeks is still the norm in the US. It’s nice, I wish I get paid every 2 weeks in my country.