'storage' — the form files, APIs and re-parses use: English function names, , argument
separators, . decimals, English boolean and error words, and an external book as its [n]
position. It reads the same in every language and locale.'display' — the form a person reads and edits: function names, booleans, errors and
structured-reference specifiers from the active language pack, separators from the workbook
locale, and an external book as its own path ('C:\dir\[Book.xlsx]Sheet1'!A1).The same choice applies to text going in: ICalculation.createFormula reads storage text unless told the text is display.
Who a formula's text is for.