I think this is mostly a US thing. Why use yearly salary? You’re not paid once a year, are you? Most likely once a month. Referencing monthly salary makes much more sense.
“I’m making 50k”. Great, now I have to guess - dollars? Monthly? Yearly? If yearly then what’s the monthly paycheck? Net? Gross?
They mean they get paid their monthly salary 14 times.
Why 14?
Edit: other parts of this thread make it clear months 13 and 14 are bonuses the employee is entitled to. Spain does not use a 14 month calendar.
Correct, they’re ‘bonuses’