The encodings to be automatically detected can be configureed by setting the gsettings key detect-encodings for the wanted encodings.
On Linux, run this command once:
gsettings set org.gnome.meld detect-encodings "['UTF-8', 'WINDOWS-1252', 'ISO-8859-15', 'UTF-16']"
On Windows, this can be done by via a string parameter of the registry key HKEY_CURRENT_USER\Software\GSettings\org\gnome\meld.
Edit or add a new string parameter detect-encodings with the approvriate value, e.g. ['WINDOWS-1251', 'UTF-8', 'ISO-8859-15', 'UTF-16'].
The information above was found on Stackoverflow:
— Martin Burnicki martin.burnicki@burnicki.net, last updated 2022-04-08