Turn on the locale option and edit the appropriate lines, for example fromLabel or December :
$('#datePicker').daterangepicker({ "locale": { "format": "MM/DD/YYYY", "separator": " - ", "applyLabel": "Apply", "cancelLabel": "Cancel", "fromLabel": "From", "toLabel": "To", "customRangeLabel": "Custom", "daysOfWeek": [ "Su", "Mo", "Tu", "We", "Th", "Fr", "Sa" ], "monthNames": [ "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" ], "firstDay": 1 } })
here is a demo with the names of the spanish month → http://jsfiddle.net/r21747qc/
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