> represented with comma instead of period,

In many countries comma is used as "decimal point". ¹

My first idea would be to check the locale settings of your system.

Also dynamically check/reset inside Perl and Tk, like shown here https://perldoc.perl.org/perllocale#Category-LC_NUMERIC:-Numeric-Formatting

Cheers Rolf
(addicted to the Perl Programming Language :)
see Wikisyntax for the Monastery

updates

¹) since Canada is using both, crossing the street in Montreal might instantly destroy your wealth ;-)

In reply to Re: Strawberry 5.40 Tk affects floating point comma separator (perllocale) by LanX
in thread Strawberry 5.40 Tk affects floating point comma separator by olgo

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