Pass param dynamic when Retrieving Translation Strings

I’m doing a upload many file and trying pass param to get message within for loop, how I can send param index to blade {{__()}}

I try do below, input work but label doesn’t work: {{__(‘cha_content.attach1_{{$i}}]’)}}

in blade file:

@for ($i = 1; $i <= 11; $i++)
    <div class="form-group row">
        <label class="col-sm-3 col-form-label font-weight-bold text-right">{{__('cha_content.attach1_{{$i}}]')}}</label>
        <div class="col-sm-6">
            <input class="form-control" type="file" id="attach1_{{ $i }}" name="attach1_{{ $i }}">
        </div>
    </div>
@endfor

in lang file:

<?php
return [
    'attach1_1'=>'1. Plan report',
    'attach1_2'=>'2. Cancelation report',
    'attach1_3'=>'3. Daily report',
    'attach1_4'=>'4. Process report',
    'attach1_5'=>'5. Site Specific',
    'attach1_6'=>'6. Visitor Log',
    'attach1_7'=>'7. Deployment plan',
    'attach1_8'=>'8. ...',
    'attach1_9'=>'9. ...',
    'attach1_10'=>'10. ...',
    'attach1_11'=>'11. ...',
    ...

my result:
(https://i.stack.imgur.com/Uestc.png)

>Solution :

Takes a string value inside the __($param) expression. It will be enough to specify that string value.

With this way:

{{__('cha_content.attach1_' . $i)}}