I\'ve got an Excel spreadsheet, with a Macro, that inserts a conditional formatting, like this:
Selection.FormatConditions.Add Type:=xlExpression, Formula1:=
Store (a trivial version of) the formula in a (hidden) cell in your workbook.
Then when you open the workbook that formula will be translated automatically by excel for the user.
Now you just have to dissect this formula in your script (find the opening bracket "(" and take the past left of that:
Use something like:
strLocalizedFormula = Mid(strYourFormula, 2, InStr(1, strYourFormula, "(") - 2)
where strYourFormula will be a copy from the formula from your worksheet.
I hope this works as I only use an English environment.
Also from reading this: http://vantedbits.blogspot.nl/2010/10/excel-vba-tip-translate-formulas.html I am thinking you should (only) be able to use the english version of a cell formula from VBA.