@page "/spreadsheet-localization" Spreadsheet Localization Set the Culture property to control how RadzenSpreadsheet parses typed input, renders number formats, and localizes formula entry. In comma-decimal cultures such as de-DE or es-ES users type 10,50 for ten and a half and enter formulas as =SUM(A1;B1) or =A1*1,5 - just like Excel. Set UICulture to localize the toolbar and menus. Files (XLSX, CSV) and the programmatic Cell.Formula API always use canonical invariant values regardless of the culture.