diff --git a/Numbers/Words/Locale/sr.php b/Numbers/Words/Locale/sr.php
new file mode 100755
index 0000000..5c3067c
--- /dev/null
+++ b/Numbers/Words/Locale/sr.php
@@ -0,0 +1,585 @@
+<?php
+/**
+ * Numbers_Words
+ *
+ * PHP version 5
+ *
+ * Copyright (c) 1997-2006 The PHP Group
+ *
+ * This source file is subject to version 3.01 of the PHP license,
+ * that is bundled with this package in the file LICENSE, and is
+ * available at through the world-wide-web at
+ * http://www.php.net/license/3_01.txt
+ * If you did not receive a copy of the PHP license and are unable to
+ * obtain it through the world-wide-web, please send a note to
+ * license@php.net so we can mail you a copy immediately.
+ *
+ * @category Numbers
+ * @package  Numbers_Words
+ * @author   Piotr Klaban <makler@man.torun.pl>
+ * @license  PHP 3.01 http://www.php.net/license/3_01.txt
+ * @version  SVN: $Id$
+ * @link     http://pear.php.net/package/Numbers_Words
+ */
+
+/**
+ * Class for translating numbers into Serbian.
+ *
+ * @author Piotr Klaban
+ * @author (of Serbian translation) Andrej Mićić
+ * @package Numbers_Words
+ */
+
+/**
+ * Include needed files
+ */
+require_once "Numbers/Words.php";
+
+/**
+ * Class for translating numbers into American English.
+ *
+ * @category Numbers
+ * @package  Numbers_Words
+ * @author   Piotr Klaban <makler@man.torun.pl>
+ * @license  PHP 3.01 http://www.php.net/license/3_01.txt
+ * @link     http://pear.php.net/package/Numbers_Words
+ */
+class Numbers_Words_Locale_sr extends Numbers_Words
+{
+
+    // {{{ properties
+
+    /**
+     * Locale name
+     * @var string
+     * @access public
+     */
+    var $locale = 'sr';
+
+    /**
+     * Language name in English
+     * @var string
+     * @access public
+     */
+    var $lang = 'Serbian';
+
+    /**
+     * Native language name
+     * @var string
+     * @access public
+     */
+    var $lang_native = 'srpski';
+
+    /**
+     * The word for the minus sign
+     * @var string
+     * @access private
+     */
+    var $_minus = 'minus'; // minus sign
+
+    /**
+     * The sufixes for exponents (singular and plural)
+     * Names partly based on:
+     * http://home.earthlink.net/~mrob/pub/math/largenum.html
+     * http://mathforum.org/dr.math/faq/faq.large.numbers.html
+     * http://www.mazes.com/AmericanNumberingSystem.html
+     * @var array
+     * @access private
+     */
+    var $_exponent = array(
+        0 => array('','',''),
+        3 => array('hiljada','hiljade','hiljada'),
+        6 => array('milion','miliona'),
+        9 => array('milijarda','milijarde','milijardi'),
+        12 => array('bilion','biliona'),
+        15 => array('bilijarda','bilijarde','bilijardi'),
+        18 => array('trilion','triliona'),
+        21 => array('trilijarda','trilijarde','trilijardi'),
+        24 => array('kvadrilion','kvadriliona'),
+        27 => array('kvadrilijarda','kwadrylijarde','kvadrilijardi'),
+        30 => array('kwintilion','kwintiliona'),
+        33 => array('kvintilijarda','kvintilijarde','kvintilijardi'),
+        36 => array('sekstilion','sekstiliona'),
+        39 => array('sekstilijarda','sekstilijarde','sekstilijardi'),
+        42 => array('septilion','septiliona'),
+        45 => array('septilijarda','septilijarde','septilijardi'),
+        48 => array('oktilion','oktiliona'),
+        51 => array('oktilijarda','oktilijarde','oktilijardi'),
+        54 => array('nonilion','noniliona'),
+        57 => array('nonilijarda','nonilijarde','nonilijardi'),
+       60 => array('novemdecilion'),
+       63 => array('vigintilion'),
+       66 => array('unvigintilion'),
+       69 => array('duovigintilion'),
+       72 => array('trevigintilion'),
+       75 => array('kvatrovigintilion'),
+       78 => array('quinvigintilion'),
+       81 => array('seksvigintilion'),
+       84 => array('septenvigintilion'),
+       87 => array('oktovigintilion'),
+       90 => array('novemvigintilion'),
+       93 => array('trigintilion'),
+       96 => array('untrigintilion'),
+       99 => array('duotrigintilion'),
+       // 100 => array('googol') - not latin name
+       // 10^googol = 1 googolplex
+      102 => array('trestrigintilion'),
+      105 => array('kvatrotrigintilion'),
+      108 => array('quintrigintilion'),
+      111 => array('sekstrigintilion'),
+      114 => array('septentrigintilion'),
+      117 => array('oktotrigintilion'),
+      120 => array('novemtrigintilion'),
+      123 => array('quadragintilion'),
+      126 => array('unquadragintilion'),
+      129 => array('duoquadragintilion'),
+      132 => array('trequadragintilion'),
+      135 => array('kvatroquadragintilion'),
+      138 => array('kvinkvadragintilion'),
+      141 => array('seksquadragintilion'),
+      144 => array('septenquadragintilion'),
+      147 => array('oktoquadragintilion'),
+      150 => array('novemquadragintilion'),
+      153 => array('kvinkvagintilion'),
+      156 => array('unkvinkvagintilion'),
+      159 => array('duokvinkvagintilion'),
+      162 => array('trekvinkvagintilion'),
+      165 => array('kvatrokvinkvagintilion'),
+      168 => array('quinkvinkvagintilion'),
+      171 => array('sekskvinkvagintilion'),
+      174 => array('septenkvinkvagintilion'),
+      177 => array('oktokvinkvagintilion'),
+      180 => array('novemkvinkvagintilion'),
+      183 => array('seksagintilion'),
+      186 => array('unseksagintilion'),
+      189 => array('duoseksagintilion'),
+      192 => array('treseksagintilion'),
+      195 => array('kvatroseksagintilion'),
+      198 => array('quinseksagintilion'),
+      201 => array('seksseksagintilion'),
+      204 => array('septenseksagintilion'),
+      207 => array('oktoseksagintilion'),
+      210 => array('novemseksagintilion'),
+      213 => array('septuagintilion'),
+      216 => array('unseptuagintilion'),
+      219 => array('duoseptuagintilion'),
+      222 => array('treseptuagintilion'),
+      225 => array('kvatroseptuagintilion'),
+      228 => array('quinseptuagintilion'),
+      231 => array('seksseptuagintilion'),
+      234 => array('septenseptuagintilion'),
+      237 => array('oktoseptuagintilion'),
+      240 => array('novemseptuagintilion'),
+      243 => array('oktogintilion'),
+      246 => array('unoktogintilion'),
+      249 => array('duooktogintilion'),
+      252 => array('treoktogintilion'),
+      255 => array('kvatrooktogintilion'),
+      258 => array('quinoktogintilion'),
+      261 => array('seksoktogintilion'),
+      264 => array('septoktogintilion'),
+      267 => array('oktooktogintilion'),
+      270 => array('novemoktogintilion'),
+      273 => array('nonagintilion'),
+      276 => array('unnonagintilion'),
+      279 => array('duononagintilion'),
+      282 => array('trenonagintilion'),
+      285 => array('kvatrononagintilion'),
+      288 => array('quinnonagintilion'),
+      291 => array('seksnonagintilion'),
+      294 => array('septennonagintilion'),
+      297 => array('oktononagintilion'),
+      300 => array('novemnonagintilion'),
+      303 => array('centilion'),
+      309 => array('duocentilion'),
+      312 => array('trecentilion'),
+      366 => array('primo-vigesimo-centilion'),
+      402 => array('trestrigintacentilion'),
+      603 => array('ducentilion'),
+      624 => array('septenducentilion'),
+     // bug on a earthlink page: 903 => array('trecentilion'),
+     2421 => array('seksoctingentilion'),
+     3003 => array('mililion'),
+     3000003 => array('mili-mililion')
+        );
+
+    /**
+     * The array containing the digits (indexed by the digits themselves).
+     * @var array
+     * @access private
+     */
+    var $_digits = array(
+        0 => 'nula', 'jedan', 'dva', 'tri', 'četiri',
+        'pet', 'šest', 'sedam', 'osam', 'devet'
+    );
+
+    /**
+     * The word separator
+     * @var string
+     * @access private
+     */
+    var $_sep = '';
+
+    /**
+     * The currency names (based on the below links,
+     * informations from central bank websites and on encyclopedias)
+     *
+     * @var array
+     * @link http://30-03-67.dreamstation.com/currency_alfa.htm World Currency Information
+     * @link http://www.jhall.demon.co.uk/currency/by_abbrev.html World currencies
+     * @link http://www.shoestring.co.kr/world/p.visa/change.htm Currency names in English
+     * @access private
+     */
+    var $_currency_names = array(
+      'ALL' => array(array('leka'), array('qindarka')),
+      'AUD' => array(array('australijskih dolara'), array('centa')),
+      'BAM' => array(array('konvertibilnih maraka'), array('fenig')),
+      'BGN' => array(array('leva'), array('stotinki')),
+      'BRL' => array(array('reala'), array('stotinki')),
+      'BYR' => array(array('beloruskih rubalja'), array('kopiejka')),
+      'CAD' => array(array('kanadskih dolara'), array('centa')),
+      'CHF' => array(array('švajcarskih franaka'), array('rapp')),
+      'CYP' => array(array('kiparskih funti'), array('centa')),
+      'CZK' => array(array('čeških kruna'), array('halerz')),
+      'DKK' => array(array('danskih kruna'), array('ore')),
+      'EEK' => array(array('kruna'), array('centa')),
+      'EUR' => array(array('evra'), array('evro-centa')),
+      'GBP' => array(array('funta', 'funti'), array('pence', 'pence')),
+      'HKD' => array(array('hongkongških dolara'), array('centa')),
+      'HRK' => array(array('hrvatskih kuna'), array('lipa')),
+      'HUF' => array(array('forint'), array('filler')),
+      'ILS' => array(array('new sheqel','new sheqels'), array('agora','agorot')),
+      'ISK' => array(array('islandskih kruna'), array('aurar')),
+      'JPY' => array(array('jena'), array('sen')),
+      'LTL' => array(array('litas'), array('centa')),
+      'LVL' => array(array('lat'), array('sentim')),
+      'MKD' => array(array('makedonskih dinara'), array('deni')),
+      'MTL' => array(array('malteških lira'), array('centym')),
+      'NOK' => array(array('norveških kruna'), array('oere')),
+      'PLN' => array(array('zlota', 'zlotys'), array('grosz')),
+      'ROL' => array(array('leja'), array('bani')),
+      'RSD' => array(array('srpskih dinara'), array('para')),
+      'RUB' => array(array('rubalja'), array('kopiejka')),
+      'SEK' => array(array('švedskih kruna'), array('oere')),
+      'SIT' => array(array('tolara'), array('stotinki')),
+      'SKK' => array(array('slovačkih kruna'), array()),
+      'TRL' => array(array('lira'), array('kuru�')),
+      'UAH' => array(array('hryvna'), array('centa')),
+      'USD' => array(array('dolara'), array('centa')),
+      'YUM' => array(array('dinara'), array('para')),
+      'ZAR' => array(array('randa'), array('centa'))
+    );
+
+    /**
+     * The default currency name
+     * @var string
+     * @access public
+     */
+    var $def_currency = 'RSD'; // Serbian Dinar
+
+    // }}}
+    // {{{ _toWords()
+
+    /**
+     * Converts a number to its word representation
+     * in American English language
+     *
+     * @param integer $num       An integer between -infinity and infinity inclusive :)
+     *                           that need to be converted to words
+     * @param integer $power     The power of ten for the rest of the number to the right.
+     *                           Optional, defaults to 0.
+     * @param integer $powsuffix The power name to be added to the end of the return string.
+     *                            Used internally. Optional, defaults to ''.
+     *
+     * @return string  The corresponding word representation
+     *
+     * @access protected
+     * @author Piotr Klaban <makler@man.torun.pl>
+     * @since  Numbers_Words 0.16.3
+     */
+    function _toWords($num, $power = 0, $powsuffix = 'dinara')
+    {
+        $ret = '';
+
+        // add a minus sign
+        if (substr($num, 0, 1) == '-') {
+            $ret = $this->_sep . $this->_minus;
+            $num = substr($num, 1);
+        }
+
+        // strip excessive zero signs and spaces
+        $num = trim($num);
+        $num = preg_replace('/^0+/', '', $num);
+
+        if (strlen($num) > 3) {
+            $maxp = strlen($num)-1;
+            $curp = $maxp;
+            for ($p = $maxp; $p > 0; --$p) { // power
+
+                // check for highest power
+                if (isset($this->_exponent[$p])) {
+                    // send substr from $curp to $p
+                    $snum = substr($num, $maxp - $curp, $curp - $p + 1);
+                    $snum = preg_replace('/^0+/', '', $snum);
+                    if ($snum !== '') {
+                        $cursuffix = $this->_exponent[$power][count($this->_exponent[$power])-1];
+                        if ($powsuffix != '') {
+                            $cursuffix .= $this->_sep . $powsuffix;
+                        }
+
+                        $ret .= $this->_toWords($snum, $p, $cursuffix);
+                    }
+                    $curp = $p - 1;
+                    continue;
+                }
+            }
+            $num = substr($num, $maxp - $curp, $curp - $p + 1);
+            if ($num == 0) {
+                return $ret;
+            }
+        } elseif ($num == 0 || $num == '') {
+            return $this->_sep . $this->_digits[0];
+        }
+
+        $h = $t = $d = 0;
+
+        switch(strlen($num)) {
+        case 3:
+            $h = (int)substr($num, -3, 1);
+
+        case 2:
+            $t = (int)substr($num, -2, 1);
+
+        case 1:
+            $d = (int)substr($num, -1, 1);
+            break;
+
+        case 0:
+            return;
+            break;
+        }
+
+        if ($h) {
+            if (in_array($this->_digits[$h], [2,3,4])) {
+                $hundredsString = 'stotine';
+            } else {
+                $hundredsString = 'stotina';
+            }
+            $ret .= $this->_sep . $this->_digits[$h] . $this->_sep . $hundredsString;
+
+            // in English only - add ' and' for [1-9]01..[1-9]99
+            // (also for 1001..1099, 10001..10099 but it is harder)
+            // for now it is switched off, maybe some language purists
+            // can force me to enable it, or to remove it completely
+            // if (($t + $d) > 0)
+            //   $ret .= $this->_sep . 'and';
+        }
+
+        // ten, twenty etc.
+        switch ($t) {
+        case 9:
+        case 8:
+        case 7:
+        case 3:
+        case 2:
+            $ret .= $this->_sep . $this->_digits[$t] . 'deset';
+            break;
+
+        case 6:
+            $ret .= $this->_sep . 'šezdeset';
+            break;
+
+        case 5:
+            $ret .= $this->_sep . 'pedeset';
+            break;
+
+        case 4:
+            $ret .= $this->_sep . 'četrdeset';
+            break;
+
+        case 1:
+            switch ($d) {
+            case 0:
+                $ret .= $this->_sep . 'deset';
+                break;
+
+            case 1:
+                $ret .= $this->_sep . 'jedanaest';
+                break;
+
+                case 4:
+                $ret .= $this->_sep . 'četrnaest';
+                break;
+
+            case 2:
+            case 3:
+            case 5:
+            case 6:
+            case 7:
+            case 8:
+            case 9:
+                $ret .= $this->_sep . $this->_digits[$d] . 'naest';
+                break;
+            }
+            break;
+        }
+
+        if ($t != 1 && $d > 0) { // add digits only in <0>,<1,9> and <21,inf>
+            // add minus sign between [2-9] and digit
+            if ($t > 1) {
+                $ret .= $this->_sep . 'i' . $this->_sep . $this->_digits[$d];
+            } else {
+                $ret .= $this->_sep . $this->_digits[$d];
+            }
+        }
+
+        if ($power > 0) {
+            if (isset($this->_exponent[$power])) {
+                $lev = $this->_exponent[$power];
+            }
+
+            if (!isset($lev) || !is_array($lev)) {
+                return null;
+            }
+
+            switch ($d) {
+                case 1:
+                    $suf = $lev[0];
+                    break;
+                case 2:
+                case 3:
+                case 4:
+                    $suf = $lev[1];
+                    break;
+                case 0:
+                case 5:
+                case 6:
+                case 7:
+                case 8:
+                case 9:
+                    $suf = $lev[2];
+                    break;
+            }
+
+            $ret .= $this->_sep . $suf;
+        }
+
+        if ($powsuffix != '') {
+            $ret .= $this->_sep . $powsuffix;
+        }
+
+        return $ret;
+    }
+    // }}}
+    // {{{ toCurrencyWords()
+
+    /**
+     * Converts a currency value to its word representation
+     * (with monetary units) in Serbian language
+     *
+     * @param integer $int_curr         An international currency symbol
+     *                                  as defined by the ISO 4217 standard (three characters)
+     * @param integer $decimal          A money total amount without fraction part (e.g. amount of dollars)
+     * @param integer $fraction         Fractional part of the money amount (e.g. amount of cents)
+     *                                  Optional. Defaults to false.
+     * @param integer $convert_fraction Convert fraction to words (left as numeric if set to false).
+     *                                  Optional. Defaults to true.
+     *
+     * @return string  The corresponding word representation for the currency
+     *
+     * @access public
+     * @author Piotr Klaban <makler@man.torun.pl>
+     * @since  Numbers_Words 0.4
+     */
+    function toCurrencyWords($int_curr, $decimal, $fraction = false, $convert_fraction = true)
+    {
+        $int_curr = strtoupper($int_curr);
+        if (!isset($this->_currency_names[$int_curr])) {
+            $int_curr = $this->def_currency;
+        }
+
+        $curr_names = $this->_currency_names[$int_curr];
+
+        $ret  = trim($this->_toWords($decimal));
+        $lev  = $this->_get_numlevel($decimal);
+        $ret .= $this->_sep . $curr_names[0][$lev];
+
+        if ($fraction !== false) {
+            if ($convert_fraction) {
+                $ret .= $this->_sep . trim($this->_toWords($fraction));
+            } else {
+                $ret .= $this->_sep . $fraction;
+            }
+            $lev  = $this->_get_numlevel($fraction);
+            $ret .= $this->_sep . $curr_names[1][$lev];
+        }
+
+        return $ret;
+    }
+    // }}}
+
+    // {{{ _get_numlevel()
+
+    /**
+     * Returns grammatical "level" of the number - this is necessary
+     * for choosing the right suffix for exponents and currency names.
+     *
+     * @param integer $num An integer between -infinity and infinity inclusive
+     *                     that need to be converted to words
+     *
+     * @return integer  The grammatical "level" of the number.
+     *
+     * @access private
+     * @author Piotr Klaban <makler@man.torun.pl>
+     * @since  Numbers_Words 0.4
+     */
+    function _get_numlevel($num)
+    {
+        if (strlen($num) > 3) {
+            $num = substr($num, -3);
+        }
+        $num = (int) $num;
+
+        $h = $t = $d = $lev = 0;
+
+        switch (strlen($num)) {
+            case 3:
+                $h = (int)substr($num, -3, 1);
+
+            case 2:
+                $t = (int)substr($num, -2, 1);
+
+            case 1:
+                $d = (int)substr($num, -1, 1);
+                break;
+
+            case 0:
+                return $lev;
+                break;
+        }
+
+        if ($t == 1) {
+            $d = 0;
+        }
+
+        if (( $h + $t ) > 0 && $d == 1) {
+            $d = 0;
+        }
+
+        switch ($d) {
+            case 1:
+                $lev = 0;
+                break;
+            case 2:
+            case 3:
+            case 4:
+                $lev = 1;
+                break;
+            default:
+                $lev = 2;
+        }
+        return $lev;
+    }
+    // }}}
+
+}