card/merchant/assets/plugins/fileuploads/js/file-upload.js

$('.dropify').dropify({
	messages: {
		'default': 'Drag and drop a file here or click',
		'replace': 'Drag and drop or click to replace',
		'remove': 'Remove',
		'error': 'Ooops, something wrong appended.'
	},
	error: {
		'fileSize': 'The file size is too big (2M max).'
	}
});