That worked!
My field list was a separate object so i also had to include it to be more like this:
L10n.load({
"en-US": {
pivotview: {
dropText: 'Example: ("Sum(Column 1)" + "Sum(Column 2)") * 250'
},
pivotfieldlist: {
dropText: 'Example: ("Sum(Column 1)" + "Sum(Column 2)") * 250'
}
}
});
For good measure, i also included this at the top;
Other than that, it's working great!