Thanks for your posting and using Aspose.Cells.
Do you have a Spanish Microsoft Excel or do you have English Microsoft Excel which is used after changing the Date & Regional Settings to Spanish.
Please also provide us your xls and xlsx files so that we could investigate this issue by loading your files in Aspose.Cells APIs. Also it will be helpful if you could provide us some screenshots highlighting your issue in detail. Thanks for your cooperation.
Thanks for your posting and screenshots and using Aspose.Cells.
Does it means your client machine has created your source excel file and you load that source file in Aspose.Cells API and find the problem. This happens with xlsx only and not with xls. Kindly also attach your both excel xls and xlsx files so that we could look into it and find the possible solution.
var cells = workbook.Worksheets.Cells;
var cell = cells[“F2”];
workbook.Settings.Region = CountryCode.Spain;