How can we check a specific language month names in an excel filename?

we would recommend to open a new topic for your case and get individually support

also have a look here:
:ambulance: :sos: [FirstAid] Datatable: Debug & Analysis invalid DateTime Strings / String to DateTime Parsing Issues - News / Tutorials - UiPath Community Forum

Issue looks more about the swapped day / month part as 13/11/2023 is not in format

and with this pattern is is correctly complaining a 13th Month