snipe-it/resources/lang/en/admin/custom_fields/message.php

<?php

return array(

    'field' => [
        'invalid'   => 'That field does not exist.',
        'already_added'   => 'Field already added',

        'create' => [
            'error'   => 'Field was not created, please try again.',
            'success' => 'Field created successfully.',
            'assoc_success' => 'Field successfully added to fieldset.',
        ],

        'update' => [
            'error'   => 'Field was not updated, please try again',
            'success' => 'Field updated successfully.',
        ],

        'delete' => [
            'confirm'   	=> 'Are you sure you wish to delete this field?',
            'error'   => 'There was an issue deleting the field. Please try again.',
            'success' => 'The field was deleted successfully.',
            'in_use'   => 'Field is still in use.',
        ],

    ],

    'fieldset' => [

        'does_not_exist' => 'Fieldset does not exist',

        'create' => [
            'error'   => 'Fieldset was not created, please try again.',
            'success' => 'Fieldset created successfully.',
        ],

        'update' => [
            'error'   => 'Fieldset was not updated, please try again',
            'success' => 'Fieldset updated successfully.',
        ],

        'delete' => [
            'confirm'   	=> 'Are you sure you wish to delete this fieldset?',
            'error'   => 'There was an issue deleting the fieldset. Please try again.',
            'success' => 'The fieldset was deleted successfully.',
            'in_use'   => 'Fieldset is still in use.',
        ],

    ],

);