PHP Stemming with PHP Morphy

{
  "repositories": [
    {
      "type": "package",
      "package": {
        "name": "phpmorphy/ru",
        "version": "0.3.7",
        "dist": {
          "url": "http://sourceforge.net/projects/phpmorphy/files/phpmorphy-dictionaries/0.3.x/ru_RU/morphy-0.3.x-ru_RU-nojo-utf8.zip/download",
          "type": "zip"
        }
      }
    },
    {
      "type": "package",
      "package": {
        "name": "phpmorphy/en",
        "version": "0.3.7",
        "dist": {
          "url": "http://sourceforge.net/projects/phpmorphy/files/phpmorphy-dictionaries/0.3.x/en_EN/morphy-0.3.x-en_EN-windows-1250.zip/download",
          "type": "zip"
        }
      }
    },
    {
      "type": "package",
      "package": {
        "name": "phpmorphy/phpmorphy",
        "version": "0.3.7",
        "dist": {
          "url": "http://sourceforge.net/projects/phpmorphy/files/phpmorphy/0.3.7/phpmorphy-0.3.7.zip/download",
          "type": "zip"
        },
        "require": {
          "phpmorphy/ru": "x",
          "phpmorphy/en": "x"
        },
        "autoload": {
          "files": ["src/common.php"]
        }
      }
    }
  ],
  "require": {
    "phpmorphy/phpmorphy": "0.3.x"
  }
}

<?php
require_once 'vendor/autoload.php';

class Morphy
{
    /**
        * @var phpMorphy
        */
    private $enMorphy;

    /**
        * @var phpMorphy
        */
    private $ruMorphy;

    public function __construct($storage = PHPMORPHY_STORAGE_FILE)
    {
        $this->ruMorphy = new phpMorphy(
            new phpMorphy_FilesBundle(realpath(PHPMORPHY_DIR . '/../../ru/'), 'rus'),
            array('storage' => $storage));

        $this->enMorphy = new phpMorphy(
            new phpMorphy_FilesBundle(realpath(PHPMORPHY_DIR . '/../../en/'), 'eng'),
            array('storage' => $storage)
        );
    }

    /**
        * @param string $word to get base from
        * @return string
        */
    public function base($word)
    {
        $sanitizedWord = $this->sanitize($word);
        $result = $this->getMorphy($sanitizedWord)->getBaseForm($sanitizedWord);

        return $result ? mb_strtolower(array_shift($result), 'UTF-8') : null;
    }

    /**
        * @param string $word to sanitize
        * @return string
        */
    private function sanitize($word)
    {
        return mb_strtoupper(trim($word), 'UTF-8');
    }

    /**
        * @param string $word
        * @return phpMorphy
        */
    private function getMorphy($word)
    {
        return $this->isRussian($word) ? $this->ruMorphy : $this->enMorphy;
    }

    /**
        * @param string $word to check
        * @return bool
        */
    private function isRussian($word)
    {
        return preg_match('/[А-Я]/u', $word) ? true : false;
    }
}


$morphy = new Morphy();
echo $morphy->base('Киеве'); // киев
echo $morphy->base('Cities'); // city