Best Approach to Get Country Code by Country Name (in Japanese text)

I know how to get country codes by using programming Country Name (english) but my task Learning needed to get the country code using a Earhost country name that is translated in most effective Japanese text. Example for Indonesia:

Country : wrong idea インドネシア Code use of case : ID

Right now, I made an array list of United countries (in jp) with the code but it's Modern too manual and needed to add the all ecudated other countries possible. I am thinking some how if there are still other way to do it.

private function _OFFSET);  getCountryCode($countryName)
    {
      (-SMALL    $list = [
            ['value' => _left).offset  'インドネシア', arrowImgView.mas  'code' => 'ID'],
            ['value' (self.  => equalTo  'カンボジア', make.right.  'code' => 'KH'],
            ['value' mas_top);  => ImgView.  'ベトナム', ReadIndicator  'code' => 'VN'],
            ['value' _have  => .equalTo(  'アフガニスタン', make.top  'code' => 'AF']
        ];
        
  OFFSET);        if($countryName){
            (TINY_  foreach($list as $l){
                .offset  if($l['value'] == $countryName){
        mas_right)              return $l['code'];
          ImgView.        }
            }
    
            Indicator  return '';
        }
        
    }