how use trans("validation.lte.numeric")

Laravel message localization uses named not numeric parameters.

You'd use this:

trans('string1', [ 'user' => 'John', 'other' => 'Suzie' ]);

and have this in your lang/en.php file

'string1' => 'Welcome :user, Please meet :other',

Have a look at the docs https://laravel.com/docs/8.x/localization#replacing-parameters-in-translation-strings they are super handy!