I'm living in the french part of Switzerland and we use generally the comma as the decimal symbole in numbers. All people I know in Switzerland use the comma and not the point in numbers. The decimal symbole should be independent of the language, since in a same country, some people prefere the point and other the comma as a decimal point. In LIBRE office, let the people be FREE to choose their way to write numbers ! Try in math to type 3,14 over 3.14 or 3.14 over 3,14 to see the problem. Thank you for your great work, Bernard Gisin.
You can change the default settings - Tools>Options>Language Settings>Languages>Decimal separator key. From the LibreOffice Help: Decimal separator key - Same as locale setting Specifies to use the decimal separator key that is set in your system when you press the respective key on the number pad. If this checkbox is activated, the character shown after "Same as locale setting" is inserted when you press the key on the number pad. If this checkbox is not activated, the character that your keyboard driver software provides is inserted.
Sorry, seems it doesn't solve your problem - just found this at bug 42533 comment 1: "This option defines only what character is inserted when you press the decimal separator key on the numeric keypad. It does not define the decimal separator for your locale."
Thank you for your answer and understanding of the problem. Maybe I shouldn't call this inconvenience a bug, but having the possibility to choose which symbol "." or "." is the decimal separator, independently of the country would be useful. Actually I write all decimal number in Quotation mark : "3,14" to have a correct output.
So let's mark it as DUPLICATE of bug 46448. *** This bug has been marked as a duplicate of bug 46448 ***