<?php 
  
 $txt_file   = file_get_contents('test.ucs'); 
 $rows       = explode("\n", $txt_file); 
  
 $payload    = []; 
  
 foreach ($rows as $row) { 
     $values = explode("\t", $row); 
     $payload[] = [ 
         'key' => $values[0], 
         'value' => translate($values[1]) 
     ]; 
     if (count($payload) >= 1) { 
         break; 
     } 
 } 
 foreach ($payload as $value) { 
     file_put_contents('BTmod.new.ucs', sprintf("%s\t%s\n", $value['key'], $value['value']), FILE_APPEND); 
 } 
  
 function translate($message) { 
     if (mb_strlen(trim($message)) == 0) { 
         return ''; 
     } 
     $query = http_build_query([ 
         'auth_key' => '', 
         'text' => $message, 
         'target_lang' => 'ru', 
     ]); 
  
     $ch = curl_init(); 
     curl_setopt($ch, CURLOPT_URL,"https://api-free.deepl.com/v2/translate?" . $query); 
     curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
     $output = curl_exec($ch); 
     curl_close($ch); 
     $data = json_decode($output, true); 
     return $data ? $data['translations'][0]['text'] : $message; 
 }