diff --git a/composer.json b/composer.json
index fee33ca..142a288 100644
--- a/composer.json
+++ b/composer.json
@@ -21,8 +21,7 @@
 	"autoload": {
 		"files": [
 			"src/English/functions.php",
-			"src/Russian/functions.php",
-			"src/initialization.php"
+			"src/Russian/functions.php"
 		],
 		"psr-4": {
 			"morphos\\": "src/"
diff --git a/src/S.php b/src/S.php
index ebee11b..ec0a3a9 100644
--- a/src/S.php
+++ b/src/S.php
@@ -6,20 +6,31 @@
  */
 class S
 {
+    /** @var string Encoding used for string manipulations */
+    static protected $encoding;
+
+    static protected $cyrillicAlphabet = [
+        ['Ё', 'Й', 'Ц', 'У', 'К', 'Е', 'Н', 'Г', 'Ш', 'Щ', 'З', 'Х', 'Ъ', 'Ф', 'Ы', 'В', 'А', 'П', 'Р', 'О', 'Л', 'Д', 'Ж', 'Э', 'Я', 'Ч', 'С', 'М', 'И', 'Т', 'Ь', 'Б', 'Ю'],
+        ['ё', 'й', 'ц', 'у', 'к', 'е', 'н', 'г', 'ш', 'щ', 'з', 'х', 'ъ', 'ф', 'ы', 'в', 'а', 'п', 'р', 'о', 'л', 'д', 'ж', 'э', 'я', 'ч', 'с', 'м', 'и', 'т', 'ь', 'б', 'ю'],
+    ];
+
     /**
-     * Sets encoding for using in morphos/* functions.
+     * Sets encoding for all operations
      * @param string $encoding
      * @return bool
      */
     public static function setEncoding($encoding)
     {
-        if (function_exists('mb_internal_encoding')) {
-            mb_internal_encoding($encoding);
-        } elseif (function_exists('iconv_set_encoding')) {
-            iconv_set_encoding('internal_encoding', $encoding);
-        } else {
-            return false;
-        }
+        static::$encoding = $encoding;
+    }
+
+    /**
+     * Returns encoding used for all operations
+     * @return string
+     */
+    public static function getEncoding()
+    {
+        return static::$encoding ?: 'utf-8';
     }
 
     /**
@@ -30,11 +41,11 @@ public static function setEncoding($encoding)
     public static function length($string)
     {
         if (function_exists('mb_strlen')) {
-            return mb_strlen($string);
+            return mb_strlen($string, static::getEncoding());
         }
 
         if (function_exists('iconv_strlen')) {
-            return iconv_strlen($string);
+            return iconv_strlen($string, static::getEncoding());
         }
 
         return false;
@@ -49,16 +60,16 @@ public static function length($string)
      */
     public static function slice($string, $start, $end = null)
     {
-        if ($end != null) {
+        if ($end !== null) {
             $end -= $start;
         }
 
         if (function_exists('mb_substr')) {
-            return $end === null ? mb_substr($string, $start) : mb_substr($string, $start, $end);
+            return mb_substr($string, $start, $end, static::getEncoding());
         }
 
         if (function_exists('iconv_substr')) {
-            return $end === null ? iconv_substr($string, $start) : iconv_substr($string, $start, $end);
+            return iconv_substr($string, $start, $end ?: iconv_strlen($string), static::getEncoding());
         }
 
         return false;
@@ -72,10 +83,10 @@ public static function slice($string, $start, $end = null)
     public static function lower($string)
     {
         if (function_exists('mb_strtolower')) {
-            return mb_strtolower($string);
+            return mb_strtolower($string, static::getEncoding());
         }
 
-        return false;
+        return static::replaceByMap($string, static::$cyrillicAlphabet[0], static::$cyrillicAlphabet[1]);
     }
 
     /**
@@ -86,26 +97,24 @@ public static function lower($string)
     public static function upper($string)
     {
         if (function_exists('mb_strtoupper')) {
-            return mb_strtoupper($string);
+            return mb_strtoupper($string, static::getEncoding());
         }
 
-        return false;
+        return static::replaceByMap($string, static::$cyrillicAlphabet[1], static::$cyrillicAlphabet[0]);
     }
 
     /**
-     * Name case. (ex: Thomas, Lewis)
+     * Name case. (ex: Thomas, Lewis). Works properly with separated by '-' words
      * @param $string
      * @return bool|string
      */
     public static function name($string)
     {
-        if (function_exists('mb_strtoupper')) {
-            return implode('-', array_map(function ($word) {
-                return self::upper(self::slice($word, 0, 1)).self::lower(self::slice($word, 1));
-            }, explode('-', $string)));
+        if (strpos($string, '-') !== false) {
+            return implode('-', array_map([__CLASS__, __FUNCTION__], explode('-', $string)));
         }
 
-        return false;
+        return self::upper(self::slice($string, 0, 1)).self::lower(self::slice($string, 1));
     }
 
     /**
@@ -120,7 +129,11 @@ public static function countChars($string, array $chars)
             return count(mb_split('('.implode('|', $chars).')', $string)) - 1;
         }
 
-        return false;
+        $counter = 0;
+        foreach ($chars as $char) {
+            $counter += substr_count($string, $char);
+        }
+        return $counter;
     }
 
     /**
@@ -131,7 +144,7 @@ public static function countChars($string, array $chars)
     public static function findFirstPosition($string, $char)
     {
         if (function_exists('mb_strpos')) {
-            return mb_strpos($string, $char, 0);
+            return mb_strpos($string, $char, 0, static::getEncoding());
         }
 
         return strpos($string, $char);
@@ -145,7 +158,7 @@ public static function findFirstPosition($string, $char)
     public static function findLastPosition($string, $char)
     {
         if (function_exists('mb_strrpos')) {
-            return mb_strrpos($string, $char, 0);
+            return mb_strrpos($string, $char, 0, static::getEncoding());
         }
 
         return strrpos($string, $char);
@@ -161,14 +174,14 @@ public static function findLastPositionForOneOfChars($string, array $chars)
         if (function_exists('mb_strrpos')) {
             $last_position = false;
             foreach ($chars as $char) {
-                if (($pos = mb_strrpos($string, $char)) !== false) {
+                if (($pos = mb_strrpos($string, $char, 0, static::getEncoding())) !== false) {
                     if ($pos > $last_position) {
                         $last_position = $pos;
                     }
                 }
             }
             if ($last_position !== false) {
-                return mb_substr($string, $last_position);
+                return mb_substr($string, $last_position, null, static::getEncoding());
             }
             return false;
         }
@@ -186,9 +199,31 @@ public static function findLastPositionForOneOfChars($string, array $chars)
     public static function indexOf($string, $substring, $caseSensetive = false, $startOffset = 0)
     {
         if (function_exists('mb_stripos')) {
-            return $caseSensetive ? mb_strpos($string, $substring, $startOffset) : mb_stripos($string, $substring, $startOffset);
+            return $caseSensetive
+                ? mb_strpos($string, $substring, $startOffset, static::getEncoding())
+                : mb_stripos($string, $substring, $startOffset, static::getEncoding());
         }
 
         return false;
     }
+
+    /**
+     * @param $string
+     * @param $fromMap
+     * @param $toMap
+     * @return string
+     */
+    private static function replaceByMap($string, $fromMap, $toMap)
+    {
+        $encoding = static::getEncoding();
+        if ($encoding !== 'utf-8')
+            $string = iconv($encoding, 'utf-8', $string);
+
+        $string = strtr($string, array_combine($fromMap, $toMap));
+
+        if ($encoding !== 'utf-8')
+            $string = iconv('utf-8', $encoding, $string);
+
+        return $string;
+    }
 }
diff --git a/src/initialization.php b/src/initialization.php
deleted file mode 100644
index ff21068..0000000
--- a/src/initialization.php
+++ /dev/null
@@ -1,2 +0,0 @@
-<?php
-morphos\S::setEncoding('utf-8');