diff --git a/core/scripts/transliteration_data.php.txt b/core/scripts/transliteration_data.php.txt
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+++ b/core/scripts/transliteration_data.php.txt
@@ -0,0 +1,664 @@
+<?php
+
+/**
+ * @file
+ * Unifies formats of transliteration data from various sources.
+ *
+ * A few notes about this script:
+ * - The functions in this file are NOT SECURE, because they use PHP functions
+ *   like eval(). Absolutely do not run this script unless you trust the data
+ *   files used for input.
+ * - You will need to change the name of this file to remove the .txt extension
+ *   before running it (it has been given this name so that you cannot run it
+ *   by mistake). When you do that, move it out of your web root as well so
+ *   that it cannot be run via a URL, and run the script via the PHP command
+ *   at a command prompt.
+ * - This script, depending on which portions of it you run, depends on having
+ *   input data from various sources in sub-directories below where this file
+ *   is located. The data inputs are as follows:
+ *   - Existing Drupal Core transliteration data: Sub-directory 'data'; comes
+ *     from core/lib/Drupal/Component/Transliteration/data
+ *   - Midgardmvc data: Sub-directory 'utf8_to_ascii_db'; download from
+ *     https://github.com/bergie/midgardmvc_helper_urlize/downloads
+ *   - CPAN Text-Unidecode data: Sub-directory 'Unidecode'; download from
+ *     http://search.cpan.org/~sburke/Text-Unidecode-0.04/lib/Text/Unidecode.pm
+ *   - Node.js project: Sub-directory 'unidecoder_data'; download from
+ *     https://github.com/bitwalker/stringex/downloads
+ *   - JUnidecode project: Sub-directory 'junidecode'; download source from
+ *     http://www.ippatsuman.com/projects/junidecode/index.html
+ * - You will also need to make directory 'outdata' to hold output.
+ * - If you plan to use the 'intl' data, you will also need to have the PECL
+ *   packages 'yaml' and 'intl' installed.  See
+ *   http://php.net/manual/install.pecl.downloads.php for generic PECL
+ *   package installation instructions. The following commands on Ubuntu Linux
+ *   will install yaml and intl packages:
+ *   @code
+ *   sudo apt-get install libyaml-dev
+ *   sudo pecl install yaml
+ *   sudo apt-get install php5-intl
+ *   sudo apt-get install libicu-dev
+ *   sudo pecl install intl
+ *   @endcode
+ *   After running these commands, you will need to make sure
+ *   'extension=intl.so' and 'extension=yaml.so' are added to the php.ini file
+ *   that is in use for the PHP command-line command.
+ * - When you have collected all of the data and installed the required
+ *   packages, you will need to find the specific commands below that you want
+ *   to use and un-comment them. The preferred data source for Drupal Core is
+ *   the PECL 'intl' package, and the line that needs to be un-commented in
+ *   order to make a Drupal Core patch is:
+ *   @code
+ *   patch_drupal('outdata');
+ *   @endcode
+ * - The functions are documented in more detail in their headers where they
+ *   are defined. Many have parameters that you can use to change the output.
+ */
+
+// Commands to read various data sources:
+// $data = read_drupal_data();
+// $data = read_midgard_data();
+// $data = read_cpan_data();
+// $data = read_nodejs_data();
+// $data = read_intl_data();
+// $data = read_junidecode_data();
+
+// After running a read_*_data() function, you can print out the data
+// (it will make a LOT of output):
+// print_r($data);
+
+// Command to read in all of data sources and output in CSV format, explaining
+// the differences:
+// read_all_to_csv();
+
+// Command to patch Drupal Core data, using the intl data set, and put the
+// resulting changed data files in the 'outdata' directory:
+patch_drupal('outdata');
+
+/**
+ * Reads in all transliteration data and outputs differences in CSV format.
+ *
+ * Each data set is compared to the Drupal Core reference data set, and the
+ * differences are noted. The data must be in the locations noted in the
+ * file header above. The CSV output has several columns. The first one is the
+ * Unicode character code. The next columns contain the transliteration of
+ * that character in each of the data sets. The last column, tells what the
+ * differences are between the Drupal Core reference set and the other data
+ * sets:
+ * - missing: The target set is missing data that the Drupal set has.
+ * - provided: The target set has provided data that Drupal does not have.
+ * - case: The target and Drupal set output differ only in upper/lower case.
+ * - different: The target and Drupal set output differ in more than just case.
+ *
+ * @param bool $print_all
+ *   TRUE to print all data; FALSE (default) to print just data where there
+ *   are differences between the Drupal set and other data sources.
+ * @param bool $print_missing
+ *   TRUE to print cases where one of the non-Drupal sets is missing information
+ *   and that is the only difference; FALSE (default) to include these rows.
+ */
+function read_all_to_csv($print_all = FALSE, $print_missing = FALSE) {
+  $data = array();
+  $types = array('drupal', 'midgard', 'cpan', 'nodejs', 'junidecode', 'intl');
+
+  // Alternatively, if you just want to compare a couple of data sets, you can
+  // uncomment and edit the following line:
+  // $types = array('drupal', 'intl');
+
+  // Read in all the data.
+  foreach ($types as $type) {
+    $data[$type] = call_user_func('read_' . $type . '_data');
+  }
+
+  // Print CSV header row.
+  print "character,";
+  print implode(',', $types);
+  print ",why\n";
+
+  // Go through all the banks of character data.
+  for ($bank = 0; $bank < 256; $bank++) {
+
+    // Go through characters in bank; skip pure ASCII characters.
+    $start = ($bank == 0) ? 0x80 : 0;
+    for ($chr = $start; $chr < 256; $chr++) {
+
+      // Gather the data together for this character.
+      $row = array();
+      foreach ($types as $type) {
+        $row[$type] = (isset($data[$type][$bank][$chr]) && is_string($data[$type][$bank][$chr])) ? $data[$type][$bank][$chr] : '';
+      }
+
+      // Only print if there are differences or we are printing all data.
+      $print = $print_all;
+      $ref = $row['drupal'];
+      $why = array();
+      foreach ($types as $type) {
+        // Try to characterize what the differences are.
+        if ($row[$type] != $ref) {
+          if ($row[$type] == '') {
+            $why['missing'] = 'missing';
+            if ($print_missing) {
+              $print = TRUE;
+            }
+          }
+          elseif ($ref == '') {
+            $why['provided'] = 'provided';
+            $print = TRUE;
+          }
+          elseif ($row[$type] == strtolower($ref) || $row[$type] == strtoupper($ref)) {
+            $why['case'] = 'case';
+            $print = TRUE;
+          }
+          else {
+            $why['different'] = 'different';
+            $print = TRUE;
+          }
+        }
+      }
+
+      // Print the data line.
+      if ($print) {
+        print '0x' . sprintf('%04x', 256 * $bank + $chr) . ',';
+        foreach ($row as $out) {
+          print '"' . addcslashes($out, '"') . '", ';
+        }
+        print implode(':', $why);
+        print "\n";
+      }
+    }
+  }
+}
+
+/**
+ * Reads in 'intl' transliteration data and writes out changed Drupal files.
+ *
+ * Writes out the Drupal data files that would have to change to make our data
+ * match the intl data set.
+ *
+ * @param string $outdir
+ *   Directory to put the patched data files in (under where the script is
+ *   being run).
+ */
+function patch_drupal($outdir) {
+  $data = array();
+
+  // Note that this is hard-wired below. Changing this line will have no
+  // effect except to break this function.
+  $types = array('drupal', 'intl');
+
+  // Read in all the data.
+  foreach ($types as $type) {
+    $data[$type] = call_user_func('read_' . $type . '_data');
+  }
+
+  // Go through all the banks of character data.
+  for ($bank = 0; $bank < 256; $bank++) {
+    $print_bank = FALSE;
+
+    // Go through characters in bank; skip pure ASCII characters.
+    $start = ($bank == 0) ? 0x80 : 0;
+    $newdata = array();
+    for ($chr = 0; $chr < 256; $chr++) {
+      // Fill up the start of the ASCII range.
+      if ($chr < $start) {
+        $newdata[$chr] = chr($chr);
+        continue;
+      }
+
+      // Figure out what characters we actually have.
+      $drupal = isset($data['drupal'][$bank][$chr]) ? $data['drupal'][$bank][$chr] : NULL;
+      // Note that for intl, we only want to keep the transliteration if it
+      // has something other than '' in it.
+      $intl = isset($data['intl'][$bank][$chr]) && $data['intl'][$bank][$chr] != '' ? $data['intl'][$bank][$chr] : NULL;
+      // Make sure we have something in the Drupal data set, in case we need
+      // to print.
+      $newdata[$chr] = $drupal;
+
+      if (!isset($intl)) {
+        continue;
+      }
+      if (!isset($drupal) || $drupal != $intl) {
+        $print_bank = TRUE;
+        $newdata[$chr] = $intl;
+      }
+    }
+
+    // If we found a difference, output a data file.
+    if ($print_bank) {
+      write_data_file($newdata, $bank, $outdir);
+    }
+  }
+}
+
+/**
+ * Reads in the Drupal Core generic transliteration data set.
+ *
+ * The data is expected to be in files xNN.php in directory 'data' under
+ * this file's directory.
+ *
+ * @return array
+ *   Nested array of transliteration data. Outer keys are the first two
+ *   bytes of Unicode characters (or 0 for base ASCII characters). The next
+ *   level is the other two bytes, and the values are the transliterations.
+ *
+ * @see PHPTransliteration::readGenericData()
+ */
+function read_drupal_data() {
+  $dir = __DIR__ . '/data';
+  $out = array();
+
+  // Read data files.
+  for ($bank = 0; $bank < 256; $bank++) {
+    $base = array();
+    $file = $dir . '/x' . sprintf('%02x', $bank) . '.php';
+    if (is_file($file)) {
+      include($file);
+    }
+    $out[$bank] = $base;
+  }
+
+  return $out;
+}
+
+/**
+ * Reads in the MidgardMVC transliteration data.
+ *
+ * The data is expected to be in files xNN.php in directory utf8_to_ascii_db
+ * under the directory where this file resides. It can be downloaded from
+ * https://github.com/bergie/midgardmvc_helper_urlize/downloads.
+ *
+ * @return array
+ *   Nested array of transliteration data. Outer keys are the first two
+ *   bytes of Unicode characters (or 0 for base ASCII characters). The next
+ *   level is the other two bytes, and the values are the transliterations.
+ */
+function read_midgard_data() {
+  $dir = __DIR__ . '/utf8_to_ascii_db';
+  $out = array();
+
+  // Read data files.
+  for ($bank = 0; $bank < 256; $bank++) {
+    $UTF8_TO_ASCII = array($bank => array());
+    $file = $dir . '/x' . sprintf('%02x', $bank) . '.php';
+    if (is_file($file)) {
+      include($file);
+    }
+    $base = $UTF8_TO_ASCII[$bank];
+
+    // For unknown characters, these files have '[?]' in them. Replace with
+    // NULL for compatibility with our data.
+    $base = array_map('_replace_question_with_null', $base);
+    $out[$bank] = $base;
+  }
+
+  return $out;
+}
+
+/**
+ * Reads in the CPAN Text::Unidecode data set.
+ *
+ * The data is expected to be in files xNN.pm in directory 'Unidecode' under
+ * this file's directory. It can be downloaded from
+ * http://search.cpan.org/~sburke/Text-Unidecode-0.04/lib/Text/Unidecode.pm.
+ *
+ * @return array
+ *   Nested array of transliteration data. Outer keys are the first two
+ *   bytes of Unicode characters (or 0 for base ASCII characters). The next
+ *   level is the other two bytes, and the values are the transliterations.
+ */
+function read_cpan_data() {
+  $dir = __DIR__ . '/Unidecode';
+  $out = array();
+
+  // Read data files.
+  for ($bank = 0; $bank < 256; $bank++) {
+    $base = array();
+    $file = $dir . '/x' . sprintf('%02x', $bank) . '.pm';
+    if (is_file($file)) {
+      $base = _cpan_read_file($file);
+    }
+    $out[$bank] = $base;
+  }
+
+  return $out;
+}
+
+/**
+ * Reads in the data in a single file from the Text::Unidecode CPAN project.
+ *
+ * @param string $file
+ *   File to read from.
+ *
+ * @return array
+ *   Data read from the file.
+ *
+ * @see read_cpan_data()
+ */
+function _cpan_read_file($file) {
+
+  $contents = file($file);
+  $save = '';
+  foreach ($contents as $line) {
+    // Discard lines starting with # or $. The first line seems to have a
+    // comment starting with #, the second has a Perl line like
+    // $Text::Unidecode::Char[0x04] = [, -- and we do not want either.
+    if (preg_match('|^\s*[#\$]|', $line)) {
+      continue;
+    }
+
+    // Discard lines ending with semi-colons, which we also don't want
+    // (there seem to be two of these lines at the end of the files).
+    if (preg_match('|;\s*$|', $line)) {
+      continue;
+    }
+
+    // Replace '[?]' with nothing (that means "don't know how to
+    // transliterate"). In some files, this is encoded as qq{[?]} or
+    // qq{[?] } instead.
+    $line = str_replace('qq{[?]}', 'NULL', $line);
+    $line = str_replace('qq{[?] }', 'NULL', $line);
+    $line = str_replace("'[?]'", 'NULL', $line);
+
+    // Replace qq{} with either "" or '' or nothing, depending on what is
+    // inside it.
+    $line = str_replace('qq{\{}', "'{'", $line);
+    $line = str_replace('qq{\}}', "'}'", $line);
+    $line = str_replace('qq{\} }', "'} '", $line);
+    $line = str_replace("qq{\\\\}", '"\\\\"', $line);
+    $line = str_replace("qq{\\", "qq{'", $line);
+    $line = str_replace("qq{\"'}", "\"\\\"'\"", $line);
+    $line = preg_replace('|qq\{([^\'\}]+)\}|', "'$1'", $line);
+    $line = preg_replace('|qq\{([^\}]+)\}|', '"$1"', $line);
+
+    $save .= $line;
+  }
+
+  // Now we should have a string that looks like:
+  // 'a', 'b', ...
+  // Evaluate as an array.
+  $save = 'return array(' . $save . ');';
+
+  $data = @eval($save);
+  if (isset($data) && is_array($data)) {
+    $data = array_map('_replace_hex_with_character', $data);
+  }
+  else {
+    // There was a problem, so throw an error and exit.
+    print "Problem in evaluating $file\n";
+    print $save;
+    eval($save);
+    exit();
+  }
+
+  // For unknown characters, these files may still have '[?]' in them. Replace
+  // with NULL for compatibility with our data.
+  $data = array_map('_replace_question_with_null', $data);
+
+  return $data;
+}
+
+/**
+ * Reads in the Node.js transliteration data.
+ *
+ * The data is expected to be in files xNN.yml in directory unidecoder_data
+ * under the directory where this file resides. It can be downloaded from
+ * https://github.com/bitwalker/stringex/downloads. You also need the PECL
+ * 'yaml' extension installed for this function to work.
+ *
+ * @return array
+ *   Nested array of transliteration data. Outer keys are the first two
+ *   bytes of Unicode characters (or 0 for base ASCII characters). The next
+ *   level is the other two bytes, and the values are the transliterations.
+ */
+function read_nodejs_data() {
+  $dir = __DIR__ . '/unidecoder_data';
+  $out = array();
+
+  // Read data files.
+  for ($bank = 0; $bank < 256; $bank++) {
+    $base = array();
+    $file = $dir . '/x' . sprintf('%02x', $bank) . '.yml';
+    if (is_file($file)) {
+      $base = yaml_parse_file($file);
+      // For unknown characters, these files have '[?]' in them. Replace with
+      // NULL for compatibility with our data.
+      $base = array_map('_replace_question_with_null', $base);
+    }
+    $out[$bank] = $base;
+  }
+
+  return $out;
+}
+
+/**
+ * Loads the PECL 'intl' Transliterator class's transliteration data.
+ *
+ * You need to have the PECL 'intl' package installed for this to work.
+ *
+ * @return array
+ *   Nested array of transliteration data. Outer keys are the first two
+ *   bytes of Unicode characters (or 0 for base ASCII characters). The next
+ *   level is the other two bytes, and the values are the transliterations.
+ */
+function read_intl_data() {
+  // In order to transliterate, you first have to create a transliterator
+  // object. This needs a list of transliteration operations. You can get a
+  // list of available operations with:
+  //   print_r(Transliterator::listIDs()); exit();
+  // And a few of these are documented on
+  // http://userguide.icu-project.org/transforms/general and
+  // http://www.unicode.org/reports/tr15/ (for normalizations).
+  // There are also maps to the Unicode characters at:
+  //  http://www.unicode.org/roadmaps/bmp/
+  //  http://www.unicode.org/charts/nameslist/
+  $ops = '';
+
+  // The first step in any transform: separate out accents and remove them.
+  $ops .= 'NFD; [:Nonspacing Mark:] Remove; NFC;';
+
+  // Then you need to do a bunch of language-specific or script-specific
+  // transliterations. Here is hopefully a representative set. There are
+  // quite a few scripts that don't appear to have rules currently, such
+  // as Etheopian.
+  $ops .= 'Greek-Latin; ';
+  $ops .= 'Cyrillic-Latin; ';
+  $ops .= 'Armenian-Latin; ';
+  $ops .= 'Hebrew-Latin; ';
+  $ops .= 'Arabic-Latin; ';
+  $ops .= 'Syriac-Latin; ';
+  $ops .= 'Thaana-Latin; ';
+  $ops .= 'Devanagari-Latin; ';
+  $ops .= 'Bengali-Latin; ';
+  $ops .= 'Gurmukhi-Latin; ';
+  $ops .= 'Gujarati-Latin; ';
+  $ops .= 'Oriya-Latin; ';
+  $ops .= 'Tamil-Latin; ';
+  $ops .= 'Telugu-Latin; ';
+  $ops .= 'Kannada-Latin; ';
+  $ops .= 'Malayalam-Latin; ';
+  $ops .= 'Thai-Latin; ';
+  $ops .= 'Georgian-Latin; ';
+  $ops .= 'Hangul-Latin; ';
+  $ops .= 'Mongolian-Latin/BGN; ';
+  $ops .= 'Jamo-Latin; ';
+  $ops .= 'Katakana-Latin; ';
+  $ops .= 'Any-Latin; ';
+
+  // Finally, after transforming to Latin, transform to ASCII.
+  $ops .= 'Latin-ASCII; ';
+
+  // Remove any remaining accents and recompose.
+  $ops .= 'NFD; [:Nonspacing Mark:] Remove; NFC;';
+
+  $trans = Transliterator::create($ops);
+  $out = array();
+
+  // Transliterate all possible characters.
+  for ($bank = 0; $bank < 256; $bank++) {
+    $data = array();
+    for ($chr = 0; $chr < 256; $chr++) {
+      // Skip the UTF-16 and "private use" ranges completely.
+      $OK = ($bank <= 0xd8 || $bank > 0xf8);
+
+      $result = $OK ? $trans->transliterate(mb_convert_encoding(pack('n', 256 * $bank + $chr), 'UTF-8', 'UTF-16BE')) : '';
+
+      // See if we have managed to transliterate this to ASCII or not. If not,
+      // return NULL instead of this character.
+      $max = chr(127);
+      foreach (preg_split('//u', $result, 0, PREG_SPLIT_NO_EMPTY) as $character) {
+        if ($character > $max) {
+          $OK = $OK && FALSE;
+          break;
+        }
+      }
+      $data[$chr] = ($OK) ? $result : NULL;
+    }
+    $out[$bank] = $data;
+  }
+
+  return $out;
+}
+
+/**
+ * Reads in the JUnidecode data set.
+ *
+ * The data is expected to be in files XNN.java in directory 'junidecode' under
+ * this file's directory. It can be downloaded from
+ * http://www.ippatsuman.com/projects/junidecode/index.html
+ *
+ * @return array
+ *   Nested array of transliteration data. Outer keys are the first two
+ *   bytes of Unicode characters (or 0 for base ASCII characters). The next
+ *   level is the other two bytes, and the values are the transliterations.
+ */
+function read_junidecode_data() {
+  $dir = __DIR__ . '/junidecode';
+  $out = array();
+
+  // Read data files.
+  for ($bank = 0; $bank < 256; $bank++) {
+    $base = array();
+    $file = $dir . '/X' . sprintf('%02x', $bank) . '.java';
+    if (is_file($file)) {
+      $base = _junidecode_read_file($file);
+    }
+    $out[$bank] = $base;
+  }
+
+  return $out;
+}
+
+/**
+ * Reads in the data in a single file from the JUnidecode project.
+ *
+ * @param string $file
+ *   File to read from.
+ *
+ * @return array
+ *   Data read from the file.
+ *
+ * @see read_junidecode_data()
+ */
+function _junidecode_read_file($file) {
+  $contents = file($file);
+  $save = '';
+  foreach ($contents as $line) {
+    // Discard lines starting with * or / or package or class or public or },
+    // to get rid of comments and Java code.
+    if (preg_match('|^\s*[\*/\}]|', $line)) {
+      continue;
+    }
+    if (preg_match('/^\s*package|public|class/', $line)) {
+      continue;
+    }
+
+    // Some of the lines look like this:
+    //      new String("" + (char) 0x00), // 0x00
+    // Transform to be '0x00,'
+    $line = preg_replace('|^\s*new\s+String\s*\(\s*""\s*\+\s*\(char\)\s+0x([0-9]+).*$|', '0x$1,', $line);
+
+    // Strings are in double quotes, yet many have \' in them.
+    $line = str_replace("\'", "'", $line);
+
+    // Everything else should probably be OK -- the lines are like:
+    //  "Ie", // 0x00
+    $save .= $line;
+  }
+
+  // Evaluate as an array.
+  $save = 'return array(' . $save . ');';
+
+  $data = @eval($save);
+  if (isset($data) && is_array($data)) {
+    $data = array_map('_replace_hex_with_character', $data);
+    $data = array_map('_replace_question_with_null', $data);
+  }
+  else {
+    // There was a problem, so throw an error and exit.
+    print "Problem in evaluating $file\n";
+    print $save;
+    eval($save);
+    exit();
+  }
+
+  return $data;
+}
+
+/**
+ * Callback for array_map(): Returns $data, with '[?]' replaced with NULL.
+ */
+function _replace_question_with_null($data) {
+  return ($data == '[?]' || $data == '[?] ') ? NULL : $data;
+}
+
+/**
+ * Callback for array_map(): Replaces '\xNN' with the actual character.
+ */
+function _replace_hex_with_character($item) {
+  if (strpos($item, '\x') === 0) {
+    $item = eval($item);
+  }
+  return $item;
+}
+
+/**
+ * Writes a data file out in the standard Drupal Core data format.
+ *
+ * @param array $data
+ *   Array of data to write out.
+ * @param string $bank
+ *   Bank of characters it belongs to.
+ * @param string $dir
+ *   Output directory.
+ */
+function write_data_file($data, $bank, $outdir) {
+  $dir = __DIR__ . '/' . $outdir;
+  $file = $dir . '/x' . sprintf('%02x', $bank) . '.php';
+
+  $out = '';
+  $out .= "<?php\n\n/**\n * @file\n * Generic transliteration data for the PHPTransliteration class.\n */\n\n\$base = array(\n";
+
+  // The 00 file skips the ASCII range
+  $start = 0;
+  if ($bank == 0) {
+    $start = 0x80;
+    $out .= "  // Note: to save memory plain ASCII mappings have been left out.\n";
+  }
+
+  for ($line = $start; $line <= 0xf0; $line += 0x10) {
+    $out .= '  0x' . sprintf('%02X', $line) . ' =>';
+    $elems = array_values(array_slice($data, $line, 16));
+    for ($i = 0; $i < 16; $i++ ) {
+      if (isset($elems[$i])) {
+        $out .= " '" . addcslashes($elems[$i], "'\\") . "',";
+      }
+      else {
+        $out .= ' NULL,';
+      }
+    }
+    $out .= "\n";
+  }
+
+  $out .= ");\n";
+
+  file_put_contents($file, $out);
+}