$ ./2.create.bash with_utf8.pl
The shebang is specifying bash
Using bash 4.4.19(1)-release

1
1.pl
-rwxr-xr-x 1 bob bob 125 Dec  6 11:54 1.pl
$ file -i *.pl
...
1.pl:            text/x-perl; charset=utf-8
2.excel.pl:      text/x-perl; charset=us-ascii
...
5.ping4.pl:      text/x-perl; charset=us-ascii
6.excel.pl:      text/x-perl; charset=us-ascii
latin1.pl:       text/plain; charset=iso-8859-1
without_utf8.pl: text/plain; charset=utf-8
with_utf8.pl:    text/plain; charset=utf-8
$