diff --git a/.gitignore b/.gitignore
index b1835652..e7217daa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,5 @@
 /source/fonts/*
 !/source/fonts/fonts.yaml
 /source/sass/fonts/
+/source/sass/_locales.scss
 /vendor/
diff --git a/.stylelintrc b/.stylelintrc
index 60812f77..e1e72237 100644
--- a/.stylelintrc
+++ b/.stylelintrc
@@ -2,6 +2,7 @@
   "ignoreFiles": [
     "./**/!(*.scss)",
     "./export/css/sass/**/*",
+    "./source/sass/_locales.scss",
     "./source/sass/fonts/**/*",
     "./source/sass/variables/**/*",
     "./source/sass/vendor/**/*"
diff --git a/gulpfile.babel.js b/gulpfile.babel.js
index 4d5c571f..a34523e7 100644
--- a/gulpfile.babel.js
+++ b/gulpfile.babel.js
@@ -1,4 +1,5 @@
 import browserSync from 'browser-sync';
+import cldr from 'cldr';
 import color from 'ansi-colors';
 import copy from 'recursive-copy';
 import del from 'del';
@@ -29,6 +30,7 @@ import sharp from 'sharp';
 import sourcemaps from 'gulp-sourcemaps';
 import stylelint from 'stylelint';
 import syntaxScss from 'postcss-scss';
+import tags from 'language-tags';
 import tempWrite from 'temp-write';
 import * as Throttle from 'promise-parallel-throttle';
 import url from 'url';
@@ -128,6 +130,7 @@ const buildConfig = (invocationArgs, sourceRoot, testRoot, buildRoot) => {
     `${config.dir.src.fonts}/**/*`,
     `!${config.files.src.fontsDefinition}`,
   ];
+  config.files.src.sassLocales = `${config.dir.src.sass}/_locales.scss`;
   config.files.src.meta = `${config.dir.src.meta}/**/*`;
   config.files.src.patterns = `${config.dir.src.patterns}/**/*`;
   config.files.src.templates = `${config.dir.src.patterns}/!(04-pages)/**/*.twig`;
@@ -221,6 +224,64 @@ export const buildFonts = gulp.series(cleanFonts, compileFonts);
 
 // Sass tasks
 
+const cleanSassLocaleData = () => del([config.files.src.sassLocales]);
+
+const generateSassLocaleData = done => {
+  const supplementalMetadata = cldr.extractLanguageSupplementalMetadata();
+  const localeParents = cldr.localeIds.filter(locale => locale !== 'root')
+    .concat(Object.keys(supplementalMetadata).filter(locale => {
+      return 0 === ['deprecated', 'legacy'].indexOf(supplementalMetadata[locale].reason);
+    }))
+    .map(locale => locale.replace(/_/g, '-').toLowerCase())
+    .filter(locale => tags.check(locale))
+    .reduce((localeParents, locale) => {
+      const parent = (cldr.resolveParentLocaleId(locale) || 'root').replace(/_/g, '-').toLowerCase();
+
+      localeParents[locale] = 'root' === parent ? 'und' : parent;
+      return localeParents;
+    }, {});
+
+  const locales = ['und'].concat(Object.keys(localeParents)).reduce((carry, locale) => {
+    const localeData = {};
+    const dataLocale = supplementalMetadata[locale] ? supplementalMetadata[locale]['replacement'] : locale;
+
+    if (locale in localeParents) {
+      const parent = locale.replace(/-[^-]+$/, '');
+      localeData['parent'] = parent === locale ? 'und' : parent;
+      localeData['real-parent'] = localeParents[locale];
+    }
+
+    localeData['inline-list-separator'] = cldr.extractListPatterns(dataLocale).default.middle.replace(/{[0|1]}/g, '');
+    localeData['ellipsis-final'] = cldr.extractCharacters(dataLocale).ellipsis.final.replace(/{[0|1]}/g, '');
+    localeData['numbering-system'] = cldr.extractDefaultNumberSystemId(dataLocale);
+
+    carry[locale] = localeData;
+
+    return carry;
+  }, {});
+
+  const output = fs.createWriteStream(config.files.src.sassLocales);
+
+  output.write('$locale-data: (\n');
+
+  Object.keys(locales)
+    .forEach(locale => {
+      output.write(`  "${locale}": (\n`);
+      Object.keys(locales[locale]).forEach(property => {
+        output.write(`    "${property}": "${locales[locale][property]}",\n`);
+      });
+      output.write('  ),\n');
+    });
+
+  output.write(');\n');
+
+  output.close();
+
+  done();
+};
+
+export const assembleSassLocaleData = gulp.series(cleanSassLocaleData, generateSassLocaleData);
+
 const lintSass = () => {
   if (!config.lint) {
     console.info('Skipping lintSass');
@@ -363,7 +424,7 @@ export const buildPatternLab = gulp.series(cleanPatternLab, generatePatternLab);
 
 // Combined tasks
 
-export const build = gulp.series(gulp.parallel(gulp.series(buildFonts, buildCss), buildImages, buildJs), buildPatternLab);
+export const build = gulp.series(gulp.parallel(gulp.series(gulp.parallel(assembleSassLocaleData, buildFonts), buildCss), buildImages, buildJs), buildPatternLab);
 
 export const test = gulp.parallel(validateJs, validateSass);
 
diff --git a/package-lock.json b/package-lock.json
index b5bf94c3..db3ac298 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3587,7 +3587,6 @@
           "resolved": "https://registry.npmjs.org/p-timeout/-/p-timeout-1.2.1.tgz",
           "integrity": "sha1-XrOzU7f86Z8QGhA4iAuwVOu+o4Y=",
           "dev": true,
-          "optional": true,
           "requires": {
             "p-finally": "^1.0.0"
           }
@@ -3834,8 +3833,7 @@
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/boolbase/-/boolbase-1.0.0.tgz",
       "integrity": "sha1-aN/1++YMUes3cl6p4+0xDcwed24=",
-      "dev": true,
-      "optional": true
+      "dev": true
     },
     "brace-expansion": {
       "version": "1.1.11",
@@ -4402,6 +4400,15 @@
       "integrity": "sha512-Jt9tIBkRc9POUof7QA/VwWd+58fKkEEfI+/t1/eOlxKM7ZhrczNzMFefge7Ai+39y1pR/pP6cI19guHy3FSLmw==",
       "dev": true
     },
+    "chainsaw": {
+      "version": "0.0.9",
+      "resolved": "https://registry.npmjs.org/chainsaw/-/chainsaw-0.0.9.tgz",
+      "integrity": "sha1-EaBRAtHEx4W20EFdM21aOhYSkT4=",
+      "dev": true,
+      "requires": {
+        "traverse": ">=0.3.0 <0.4"
+      }
+    },
     "chalk": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
@@ -4531,6 +4538,24 @@
         }
       }
     },
+    "cldr": {
+      "version": "4.14.0",
+      "resolved": "https://registry.npmjs.org/cldr/-/cldr-4.14.0.tgz",
+      "integrity": "sha512-M3nhAyMPwInQin4fgeMTngHHZMPkxgiuWoTDteySCsYT38wvTArgX9xVY/vnUIA2degu6sRuouf9Yhmr6+frYQ==",
+      "dev": true,
+      "requires": {
+        "escodegen": "^1.11.0",
+        "esprima": "^4.0.1",
+        "lodash": "^4.17.10",
+        "memoizeasync": "^1.1.0",
+        "passerror": "^1.1.1",
+        "pegjs": "^0.10.0",
+        "seq": "^0.3.5",
+        "unicoderegexp": "^0.4.1",
+        "xmldom": "^0.1.27",
+        "xpath": "^0.0.27"
+      }
+    },
     "cli-cursor": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/cli-cursor/-/cli-cursor-2.1.0.tgz",
@@ -7739,8 +7764,7 @@
           "version": "2.1.1",
           "resolved": false,
           "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -7764,15 +7788,13 @@
           "version": "1.0.0",
           "resolved": false,
           "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "resolved": false,
           "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
           "dev": true,
-          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -7782,22 +7804,19 @@
           "version": "1.1.0",
           "resolved": false,
           "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c=",
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "concat-map": {
           "version": "0.0.1",
           "resolved": false,
           "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "resolved": false,
           "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -7918,8 +7937,7 @@
           "version": "2.0.3",
           "resolved": false,
           "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=",
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "ini": {
           "version": "1.3.5",
@@ -7933,7 +7951,6 @@
           "resolved": false,
           "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
           "dev": true,
-          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -7950,7 +7967,6 @@
           "resolved": false,
           "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
           "dev": true,
-          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -7959,15 +7975,13 @@
           "version": "0.0.8",
           "resolved": false,
           "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=",
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "mkdirp": {
           "version": "0.5.1",
           "resolved": false,
           "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
           "dev": true,
-          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -8056,8 +8070,7 @@
           "version": "1.0.1",
           "resolved": false,
           "integrity": "sha1-CXtgK1NCKlIsGvuHkDGDNpQaAR0=",
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -8071,7 +8084,6 @@
           "resolved": false,
           "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
           "dev": true,
-          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -8167,8 +8179,7 @@
           "version": "5.1.1",
           "resolved": false,
           "integrity": "sha512-kKvNJn6Mm93gAczWVJg7wH+wGYWNrDHdWvpUmHyEsgCtIwwo3bqPtV4tR5tuPaUhTOo/kvhVwd8XwwOllGYkbg==",
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -8210,7 +8221,6 @@
           "resolved": false,
           "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
           "dev": true,
-          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -8232,7 +8242,6 @@
           "resolved": false,
           "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
           "dev": true,
-          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -8290,8 +8299,7 @@
           "version": "1.0.2",
           "resolved": false,
           "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
-          "dev": true,
-          "optional": true
+          "dev": true
         },
         "yallist": {
           "version": "3.0.3",
@@ -9345,6 +9353,15 @@
         "minimalistic-assert": "^1.0.1"
       }
     },
+    "hashish": {
+      "version": "0.0.4",
+      "resolved": "https://registry.npmjs.org/hashish/-/hashish-0.0.4.tgz",
+      "integrity": "sha1-bWC8b/r3Ebav1g5CbQd5iAFOZVQ=",
+      "dev": true,
+      "requires": {
+        "traverse": ">=0.2.4"
+      }
+    },
     "he": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/he/-/he-1.1.1.tgz",
@@ -11449,8 +11466,7 @@
               "version": "2.1.1",
               "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
               "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "aproba": {
               "version": "1.2.0",
@@ -11474,15 +11490,13 @@
               "version": "1.0.0",
               "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
               "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "brace-expansion": {
               "version": "1.1.11",
               "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
               "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
               "dev": true,
-              "optional": true,
               "requires": {
                 "balanced-match": "^1.0.0",
                 "concat-map": "0.0.1"
@@ -11499,22 +11513,19 @@
               "version": "1.1.0",
               "resolved": "https://registry.npmjs.org/code-point-at/-/code-point-at-1.1.0.tgz",
               "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "concat-map": {
               "version": "0.0.1",
               "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
               "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "console-control-strings": {
               "version": "1.1.0",
               "resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
               "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "core-util-is": {
               "version": "1.0.2",
@@ -11645,8 +11656,7 @@
               "version": "2.0.3",
               "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
               "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "ini": {
               "version": "1.3.5",
@@ -11660,7 +11670,6 @@
               "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
               "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
               "dev": true,
-              "optional": true,
               "requires": {
                 "number-is-nan": "^1.0.0"
               }
@@ -11677,7 +11686,6 @@
               "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
               "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
               "dev": true,
-              "optional": true,
               "requires": {
                 "brace-expansion": "^1.1.7"
               }
@@ -11686,15 +11694,13 @@
               "version": "0.0.8",
               "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
               "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "minipass": {
               "version": "2.3.5",
               "resolved": "https://registry.npmjs.org/minipass/-/minipass-2.3.5.tgz",
               "integrity": "sha512-Gi1W4k059gyRbyVUZQ4mEqLm0YIUiGYfvxhF6SIlk3ui1WVxMTGfGdQ2SInh3PDrRTVvPKgULkpJtT4RH10+VA==",
               "dev": true,
-              "optional": true,
               "requires": {
                 "safe-buffer": "^5.1.2",
                 "yallist": "^3.0.0"
@@ -11715,7 +11721,6 @@
               "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
               "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
               "dev": true,
-              "optional": true,
               "requires": {
                 "minimist": "0.0.8"
               }
@@ -11804,8 +11809,7 @@
               "version": "1.0.1",
               "resolved": "https://registry.npmjs.org/number-is-nan/-/number-is-nan-1.0.1.tgz",
               "integrity": "sha1-CXtgK1NCKlIsGvuHkDGDNpQaAR0=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "object-assign": {
               "version": "4.1.1",
@@ -11819,7 +11823,6 @@
               "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
               "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
               "dev": true,
-              "optional": true,
               "requires": {
                 "wrappy": "1"
               }
@@ -11915,8 +11918,7 @@
               "version": "5.1.2",
               "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
               "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "safer-buffer": {
               "version": "2.1.2",
@@ -11958,7 +11960,6 @@
               "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
               "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
               "dev": true,
-              "optional": true,
               "requires": {
                 "code-point-at": "^1.0.0",
                 "is-fullwidth-code-point": "^1.0.0",
@@ -11980,7 +11981,6 @@
               "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
               "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
               "dev": true,
-              "optional": true,
               "requires": {
                 "ansi-regex": "^2.0.0"
               }
@@ -12029,15 +12029,13 @@
               "version": "1.0.2",
               "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
               "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
-              "dev": true,
-              "optional": true
+              "dev": true
             },
             "yallist": {
               "version": "3.0.3",
               "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.3.tgz",
               "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A==",
-              "dev": true,
-              "optional": true
+              "dev": true
             }
           }
         }
@@ -13141,6 +13139,21 @@
       "integrity": "sha512-bEZlJzXo5V/ApNNa5z375mJC6Nrz4vG43UgcSCrg2OHC+yuB6j0iDSrY7RQ/+PRofFB03wNIIt9iXIVLr4wc7w==",
       "dev": true
     },
+    "language-subtag-registry": {
+      "version": "0.3.18",
+      "resolved": "https://registry.npmjs.org/language-subtag-registry/-/language-subtag-registry-0.3.18.tgz",
+      "integrity": "sha1-gM/oSN+I97+Ajb2tCyjn+iw1eN0=",
+      "dev": true
+    },
+    "language-tags": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/language-tags/-/language-tags-1.0.5.tgz",
+      "integrity": "sha1-0yHbxNowuovzAk4ED6XBRmH5GTo=",
+      "dev": true,
+      "requires": {
+        "language-subtag-registry": "~0.3.2"
+      }
+    },
     "last-run": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/last-run/-/last-run-1.1.1.tgz",
@@ -13735,8 +13748,7 @@
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/mdn-data/-/mdn-data-1.1.4.tgz",
       "integrity": "sha512-FSYbp3lyKjyj3E7fMl6rYvUdX0FBXaluGqlFoYESWQlyUTq8R+wp0rkFxoYFqZlHCvsUXGjyJmLQSnXToYhOSA==",
-      "dev": true,
-      "optional": true
+      "dev": true
     },
     "mem": {
       "version": "4.3.0",
@@ -13749,6 +13761,24 @@
         "p-is-promise": "^2.0.0"
       }
     },
+    "memoizeasync": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/memoizeasync/-/memoizeasync-1.1.0.tgz",
+      "integrity": "sha1-nXAopvJm3rczUQu327pfUYeMVh4=",
+      "dev": true,
+      "requires": {
+        "lru-cache": "2.5.0",
+        "passerror": "1.1.1"
+      },
+      "dependencies": {
+        "lru-cache": {
+          "version": "2.5.0",
+          "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-2.5.0.tgz",
+          "integrity": "sha1-2COIrpyWC+y+oMc7uet5tsbOmus=",
+          "dev": true
+        }
+      }
+    },
     "memoizee": {
       "version": "0.4.14",
       "resolved": "https://registry.npmjs.org/memoizee/-/memoizee-0.4.14.tgz",
@@ -15096,6 +15126,12 @@
       "integrity": "sha1-s2PlXoAGym/iF4TS2yK9FdeRfxQ=",
       "dev": true
     },
+    "passerror": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/passerror/-/passerror-1.1.1.tgz",
+      "integrity": "sha1-oluI292RCilgOux9y5bpp6l2h7Q=",
+      "dev": true
+    },
     "path-browserify": {
       "version": "0.0.0",
       "resolved": "https://registry.npmjs.org/path-browserify/-/path-browserify-0.0.0.tgz",
@@ -15188,6 +15224,12 @@
         "sha.js": "^2.4.8"
       }
     },
+    "pegjs": {
+      "version": "0.10.0",
+      "resolved": "https://registry.npmjs.org/pegjs/-/pegjs-0.10.0.tgz",
+      "integrity": "sha1-z4uvrm7d/0tafvsYUmnqr0YQ3b0=",
+      "dev": true
+    },
     "pend": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/pend/-/pend-1.2.0.tgz",
@@ -16920,6 +16962,16 @@
         }
       }
     },
+    "seq": {
+      "version": "0.3.5",
+      "resolved": "https://registry.npmjs.org/seq/-/seq-0.3.5.tgz",
+      "integrity": "sha1-rgKvOkJHk9jMvyEtaRdODFTf/jg=",
+      "dev": true,
+      "requires": {
+        "chainsaw": ">=0.0.7 <0.1",
+        "hashish": ">=0.0.2 <0.1"
+      }
+    },
     "serialize-javascript": {
       "version": "1.6.1",
       "resolved": "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-1.6.1.tgz",
@@ -18538,7 +18590,6 @@
       "resolved": "https://registry.npmjs.org/tempfile/-/tempfile-2.0.0.tgz",
       "integrity": "sha1-awRGhWqbERTRhW/8vlCczLCXcmU=",
       "dev": true,
-      "optional": true,
       "requires": {
         "temp-dir": "^1.0.0",
         "uuid": "^3.0.1"
@@ -18995,6 +19046,12 @@
         }
       }
     },
+    "traverse": {
+      "version": "0.3.9",
+      "resolved": "https://registry.npmjs.org/traverse/-/traverse-0.3.9.tgz",
+      "integrity": "sha1-cXuPIgzAu3tE5AUUwisui7xw2Lk=",
+      "dev": true
+    },
     "trim": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/trim/-/trim-0.0.1.tgz",
@@ -19213,6 +19270,12 @@
       "integrity": "sha512-L5RAqCfXqAwR3RriF8pM0lU0w4Ryf/GgzONwi6KnL1taJQa7x1TCxdJnILX59WIGOwR57IVxn7Nej0fz1Ny6fw==",
       "dev": true
     },
+    "unicoderegexp": {
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/unicoderegexp/-/unicoderegexp-0.4.1.tgz",
+      "integrity": "sha1-r7EOTvHu3ccRQXu7ZSvIhdqdQXE=",
+      "dev": true
+    },
     "unified": {
       "version": "7.1.0",
       "resolved": "https://registry.npmjs.org/unified/-/unified-7.1.0.tgz",
@@ -20284,12 +20347,24 @@
       "integrity": "sha1-Ey7mPS7FVlxVfiD0wi35rKaGsQ0=",
       "dev": true
     },
+    "xmldom": {
+      "version": "0.1.27",
+      "resolved": "https://registry.npmjs.org/xmldom/-/xmldom-0.1.27.tgz",
+      "integrity": "sha1-1QH5ezvbQDr4757MIFcxh6rawOk=",
+      "dev": true
+    },
     "xmlhttprequest-ssl": {
       "version": "1.5.5",
       "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz",
       "integrity": "sha1-wodrBhaKrcQOV9l+gRkayPQ5iz4=",
       "dev": true
     },
+    "xpath": {
+      "version": "0.0.27",
+      "resolved": "https://registry.npmjs.org/xpath/-/xpath-0.0.27.tgz",
+      "integrity": "sha512-fg03WRxtkCV6ohClePNAECYsmpKKTv5L8y/X3Dn1hQrec3POx2jHZ/0P2qQ6HvsrU1BmeqXcof3NGGueG6LxwQ==",
+      "dev": true
+    },
     "xtend": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
diff --git a/package.json b/package.json
index 62ca97b2..fcccc635 100644
--- a/package.json
+++ b/package.json
@@ -9,6 +9,7 @@
     "ansi-colors": "^3.2.4",
     "babel-loader": "^8.0.5",
     "browser-sync": "^2.26.5",
+    "cldr": "^4.13.0",
     "del": "^3.0.0",
     "download": "^7.1.0",
     "eslint": "^5.16.0",
@@ -34,6 +35,7 @@
     "js-yaml": "^3.13.1",
     "keyv": "^3.1.0",
     "keyv-file": "^0.1.13",
+    "language-tags": "^1.0.5",
     "minimist": "^1.2.0",
     "modularscale-sass": "^3.0.8",
     "normalize.css": "^8.0.1",
diff --git a/source/sass/base/_normalize.scss b/source/sass/base/_normalize.scss
index ce37c470..f1ad2c62 100644
--- a/source/sass/base/_normalize.scss
+++ b/source/sass/base/_normalize.scss
@@ -1,3 +1,4 @@
+@import "../functions/locales";
 @import "../mixins/decorations";
 @import "../mixins/spacing";
 @import "../mixins/typography";
@@ -160,72 +161,80 @@ p {
   }
 }
 
-:lang(ja) {
-  @at-root {
-    em#{&} {
-      font-style: normal;
-      text-emphasis-style: open sesame;
-      text‑emphasis‑position: over right;
-    }
-
-    strong#{&} {
-      font-style: normal;
-      text-emphasis-style: filled sesame;
-      text‑emphasis‑position: over right;
-    }
-
-    u#{&} {
-      text-underline-position: right;
+@if is-supported-locale(ja) {
+  :lang(ja) {
+    @at-root {
+      em#{&} {
+        font-style: normal;
+        text-emphasis-style: open sesame;
+        text‑emphasis‑position: over right;
+      }
+
+      strong#{&} {
+        font-style: normal;
+        text-emphasis-style: filled sesame;
+        text‑emphasis‑position: over right;
+      }
+
+      u#{&} {
+        text-underline-position: right;
+      }
     }
   }
 }
 
-:lang(ko) {
-  @at-root {
-    em#{&} {
-      font-style: normal;
-      text-decoration: underline;
-      text-underline-position: under right;
-    }
-
-    strong#{&} {
-      font-style: normal;
-      text-emphasis-style: filled dot;
-      text‑emphasis‑position: over right;
+@if is-supported-locale(ko) {
+  :lang(ko) {
+    @at-root {
+      em#{&} {
+        font-style: normal;
+        text-decoration: underline;
+        text-underline-position: under right;
+      }
+
+      strong#{&} {
+        font-style: normal;
+        text-emphasis-style: filled dot;
+        text‑emphasis‑position: over right;
+      }
     }
   }
 }
 
-:lang(zh) {
-  @at-root {
-    em#{&} {
-      font-style: normal;
-      text-emphasis-style: open dot;
-      text‑emphasis‑position: under right;
-    }
-
-    strong#{&} {
-      font-style: normal;
-      text-emphasis-style: filled dot;
-      text‑emphasis‑position: under right;
-    }
-
-    cite#{&} {
-      font-style: normal;
-      text-decoration: underline;
-      text-underline-style: wavy;
+@if is-supported-locale(zh) {
+  :lang(zh) {
+    @at-root {
+      em#{&} {
+        font-style: normal;
+        text-emphasis-style: open dot;
+        text‑emphasis‑position: under right;
+      }
+
+      strong#{&} {
+        font-style: normal;
+        text-emphasis-style: filled dot;
+        text‑emphasis‑position: under right;
+      }
+
+      cite#{&} {
+        font-style: normal;
+        text-decoration: underline;
+        text-underline-style: wavy;
+      }
     }
   }
 }
 
-:lang(zh-Hant) {
-  @at-root {
-    em#{&} {
-      text‑emphasis‑position: over right;
-    }
+@if is-supported-locale(zh-Hant) {
+  :lang(zh-Hant) {
+    @at-root {
+      em#{&} {
+        text‑emphasis‑position: over right;
+      }
 
-    strong#{&} {
-      text‑emphasis‑position: over right;
+      strong#{&} {
+        text‑emphasis‑position: over right;
+      }
     }
   }
 }
diff --git a/source/sass/functions/_locales.scss b/source/sass/functions/_locales.scss
new file mode 100644
index 00000000..8a0c3bab
--- /dev/null
+++ b/source/sass/functions/_locales.scss
@@ -0,0 +1,44 @@
+@import "utilities";
+@import "../locales";
+@import "../settings/locales";
+
+@function is-supported-locale($locale) {
+  $locale: to-lower-case($locale);
+
+  @if "und" == $locale {
+    @return true;
+  }
+
+  @each $supportedLocale in $locales {
+    $supportedLocale: to-lower-case($supportedLocale);
+
+    @if $supportedLocale == $locale or string-starts-with($locale, "#{$supportedLocale}-") {
+      @return true;
+    }
+  }
+
+  @return false;
+}
+
+@function get-locale-data($property) {
+  $result: ();
+
+  @each $locale, $data in $locale-data {
+    @if is-supported-locale($locale) and map-has-key($data, $property) {
+      $value: map-get($data, $property);
+
+      @if "parent" != $property and map-has-key($data, "parent") {
+        $parentLocale: map-get($data, "parent");
+        $parentData: map-get($locale-data, $parentLocale);
+
+        @if map-get($parentData, $property) != $value or not is-supported-locale($parentLocale) {
+          $result: map-merge($result, ($locale: character-to-keyword($value)));
+        }
+      } @else {
+        $result: map-merge($result, ($locale: character-to-keyword($value)));
+      }
+    }
+  }
+
+  @return $result;
+}
diff --git a/source/sass/functions/_utilities.scss b/source/sass/functions/_utilities.scss
new file mode 100644
index 00000000..60955ff1
--- /dev/null
+++ b/source/sass/functions/_utilities.scss
@@ -0,0 +1,54 @@
+@function string-starts-with($string, $test) {
+  @return str-index($string, $test) == 1;
+}
+
+@function str-last-index($string, $substr) {
+  $index: null;
+  $length: str-length($string);
+  @for $n from $length through 1 {
+    $index: str-index(str-slice($string, $n, $length), $substr);
+    @if $index {
+      @return $index + $n - 1;
+    }
+  }
+  @return $index;
+}
+
+@function character-to-keyword($character) {
+  $map: (
+    "…": ellipsis,
+  );
+
+  @if index($map, $character) {
+    @return map-get($map, $character);
+  }
+
+  @return $character;
+}
+
+@function numbering-system-to-keyword($system) {
+  $unsupported: (
+    "cakm",
+  );
+
+  $map: (
+    "arab": arabic-indic,
+    "arabext": persian,
+    "armn": armenian,
+    "beng": bengali,
+    "deva": devanagari,
+    "latn": decimal,
+    "mymr": myanmar,
+    "tibt": tibetan,
+  );
+
+  @if map-has-key($map, $system) {
+    @return map-get($map, $system);
+  }
+
+  @if index($unsupported, $system) {
+    @return map-get($map, "latn");
+  }
+
+  @error "Unknown numbering system '#{$system}'";
+}
diff --git a/source/sass/mixins/_lists.scss b/source/sass/mixins/_lists.scss
new file mode 100644
index 00000000..9a098a16
--- /dev/null
+++ b/source/sass/mixins/_lists.scss
@@ -0,0 +1,56 @@
+@import "spacing";
+@import "../functions/locales";
+
+@mixin list-style-none() {
+  @include padding(0, inline-start);
+  // Overflow auto is so the bullet will be still read from a screen reader and will push the bullet off screen
+  overflow-x: auto;
+}
+
+@mixin list-separator($separator: default) {
+
+  @if $separator == default {
+
+    @each $locale, $separator in get-locale-data(inline-list-separator) {
+
+      @if $locale == "und" {
+
+        &:after {
+          content: $separator;
+        }
+
+      } @else {
+
+        &:lang(#{$locale}):after {
+          content: $separator;
+        }
+
+      }
+
+    }
+
+    &:last-child:after {
+      content: "";
+    }
+
+  } @else if $separator == alternative {
+
+    &:after {
+      content: ";\a0";
+    }
+
+    @if is-supported-locale(ar) {
+      &:lang(ar):after {
+        content: "\61b\a0";
+      }
+    }
+
+    &:last-child:after {
+      content: "";
+    }
+
+  } @else {
+    @include _error("Unknown list separator '#{$separator}'");
+  }
+
+}
diff --git a/source/sass/mixins/_sizes.scss b/source/sass/mixins/_sizes.scss
index eeff4d39..699e287c 100644
--- a/source/sass/mixins/_sizes.scss
+++ b/source/sass/mixins/_sizes.scss
@@ -1,6 +1,7 @@
 @import "logical-properties";
 @import "types";
 @import "validation";
+@import "../functions/locales";
 
 @mixin block-size($size) {
   @include _expect_single_value($size) {
@@ -48,10 +49,21 @@
 
 @mixin truncate-with-ellipsis() {
   overflow: hidden;
-  text-overflow: ellipsis;
   white-space: nowrap;
 
-  &:lang(zh-Hant-HK) {
-    text-overflow: "⋯";
+  @each $locale, $ellipsis in get-locale-data(ellipsis-final) {
+
+    @if $locale == "und" {
+
+      text-overflow: $ellipsis;
+
+    } @else {
+
+      &:lang(#{$locale}) {
+        text-overflow: $ellipsis;
+      }
+
+    }
+
   }
 }
diff --git a/source/sass/mixins/_typography.scss b/source/sass/mixins/_typography.scss
index 6369aa96..699500e1 100644
--- a/source/sass/mixins/_typography.scss
+++ b/source/sass/mixins/_typography.scss
@@ -128,49 +128,3 @@
   font-family: $font-secondary;
   @include set-font-size-and-line-height(scale(-2));
 }
-
-@mixin list-style-none() {
-  @include padding(0, inline-start);
-  // Overflow auto is so the bullet will be still read from a screen reader and will push the bullet off screen
-  overflow-x: auto;
-}
-
-@mixin list-separator($separator: default) {
-
-  @if $separator == default {
-
-    &:after {
-      content: ",\a0";
-    }
-
-    &:lang(ar):after {
-      content: "،\a0";
-    }
-
-    &:lang(ja):after {
-      content: "、";
-    }
-
-    &:last-child:after {
-      content: "";
-    }
-
-  } @else if $separator == alternative {
-
-    &:after {
-      content: ";\a0";
-    }
-
-    &:lang(ar):after {
-      content: "\61b\a0";
-    }
-
-    &:last-child:after {
-      content: "";
-    }
-
-  } @else {
-    @include _error("Unknown list separator '#{$separator}'");
-  }
-
-}
diff --git a/source/sass/patterns/molecules/content-meta.scss b/source/sass/patterns/molecules/content-meta.scss
index 940328da..142b677a 100644
--- a/source/sass/patterns/molecules/content-meta.scss
+++ b/source/sass/patterns/molecules/content-meta.scss
@@ -1,3 +1,4 @@
+@import "../../mixins/lists";
 @import "../../mixins/spacing";
 @import "../../mixins/typography";
 
diff --git a/source/sass/patterns/molecules/inline-list.scss b/source/sass/patterns/molecules/inline-list.scss
index c0fd6a35..301c5437 100644
--- a/source/sass/patterns/molecules/inline-list.scss
+++ b/source/sass/patterns/molecules/inline-list.scss
@@ -1,3 +1,4 @@
+@import "../../mixins/lists";
 @import "../../mixins/typography";
 
 .inline-list {
diff --git a/source/sass/patterns/molecules/nav-bar.scss b/source/sass/patterns/molecules/nav-bar.scss
index 7b3f434c..38a8c31f 100644
--- a/source/sass/patterns/molecules/nav-bar.scss
+++ b/source/sass/patterns/molecules/nav-bar.scss
@@ -1,3 +1,4 @@
+@import "../../mixins/lists";
 @import "../../mixins/media-query";
 @import "../../mixins/scale";
 @import "../../mixins/spacing";
diff --git a/source/sass/patterns/molecules/tag-list.scss b/source/sass/patterns/molecules/tag-list.scss
index 1274671c..1b7ecdd9 100644
--- a/source/sass/patterns/molecules/tag-list.scss
+++ b/source/sass/patterns/molecules/tag-list.scss
@@ -1,3 +1,4 @@
+@import "../../mixins/lists";
 @import "../../mixins/sizes";
 @import "../../mixins/spacing";
 @import "../../mixins/typography";
diff --git a/source/sass/patterns/organisms/reference-list.scss b/source/sass/patterns/organisms/reference-list.scss
index a7db9751..1c768131 100644
--- a/source/sass/patterns/organisms/reference-list.scss
+++ b/source/sass/patterns/organisms/reference-list.scss
@@ -1,3 +1,5 @@
+@import "../../functions/locales";
+@import "../../mixins/lists";
 @import "../../mixins/positioning";
 @import "../../mixins/spacing";
 @import "../../mixins/typography";
@@ -16,24 +18,27 @@ $_ordinal-inline-size--large: 3rem;
 
   --ordinal-inline-size: #{$_ordinal-inline-size};
 
-  @supports (content: counter(reference-count, cjk-decimal)) {
-    &:lang(ja) {
-      --ordinal-inline-size: #{$_ordinal-inline-size--large};
+  @each $locale, $numbering-system in get-locale-data(numbering-system) {
+
+    $numbering-system: numbering-system-to-keyword($numbering-system);
+
+    @if $locale == "und" {
 
       &:before {
-        content: counter(reference-count, cjk-decimal);
+        content: counter(reference-count, $numbering-system);
+      }
+
+    } @else {
+
+      &:lang(#{$locale}):before {
+        content: counter(reference-count, $numbering-system);
       }
-    }
-  }
 
-  &:lang(ar) {
-    &:before {
-      content: counter(reference-count, arabic-indic);
     }
+
   }
 
   &:before {
-    content: counter(reference-count, decimal);
     font-weight: 600;
     font-family: $font-secondary;
     display: inline-block;
diff --git a/source/sass/patterns/organisms/teaser-list.scss b/source/sass/patterns/organisms/teaser-list.scss
index a592442a..86b097eb 100644
--- a/source/sass/patterns/organisms/teaser-list.scss
+++ b/source/sass/patterns/organisms/teaser-list.scss
@@ -1,4 +1,5 @@
 @import "../../mixins/decorations";
+@import "../../mixins/lists";
 @import "../../mixins/spacing";
 @import "../../mixins/typography";
 @import "../../settings/color";
diff --git a/source/sass/settings/_locales.scss b/source/sass/settings/_locales.scss
new file mode 100644
index 00000000..1821d4f9
--- /dev/null
+++ b/source/sass/settings/_locales.scss
@@ -0,0 +1,6 @@
+$locales: (
+  "ar",
+  "en",
+  "ja",
+  "ru",
+) !default;
diff --git a/test/sass/mixins/lists.spec.scss b/test/sass/mixins/lists.spec.scss
new file mode 100644
index 00000000..3a609473
--- /dev/null
+++ b/test/sass/mixins/lists.spec.scss
@@ -0,0 +1,74 @@
+@import "../test";
+@import "../../../source/sass/mixins/lists";
+
+@include describe("@mixin list-separator") {
+
+  @include it("Provides the default separator correctly") {
+
+    @include assert() {
+
+      @include output {
+        @include list-separator(default);
+      }
+
+      @include contains {
+        &:last-child:after {
+          content: "";
+        }
+      }
+    }
+
+    @include assert() {
+
+      @include output {
+        @include list-separator();
+      }
+
+      @include contains {
+        &:last-child:after {
+          content: "";
+        }
+      }
+    }
+
+  }
+
+  @include it("Provides the alternative separator correctly") {
+
+    @include assert() {
+
+      @include output {
+        @include list-separator(alternative);
+      }
+
+      @include expect {
+        &:after {
+          content: ";\a0";
+        }
+
+        &:lang(ar):after {
+          content: "\61b\a0";
+        }
+
+        &:last-child:after {
+          content: "";
+        }
+      }
+    }
+
+  }
+
+  @include it("errors on invalid separators") {
+    @include assert() {
+
+      @include output {
+        @include list-separator("invalid");
+      }
+
+      @include expect {
+        _error: "Unknown list separator 'invalid'";
+      }
+    }
+  };
+
+};
diff --git a/test/sass/mixins/typography.spec.scss b/test/sass/mixins/typography.spec.scss
index f8ba5208..62fb8480 100644
--- a/test/sass/mixins/typography.spec.scss
+++ b/test/sass/mixins/typography.spec.scss
@@ -87,99 +87,3 @@
   }
 
 }
-
-@include describe("@mixin list-separator") {
-
-  @include it("Provides the default separator correctly") {
-
-    @include assert() {
-
-      @include output {
-        @include list-separator(default);
-      }
-
-      @include expect {
-        &:after {
-          content: ",\a0";
-        }
-
-        &:lang(ar):after {
-          content: "،\a0";
-        }
-
-        &:lang(ja):after {
-          content: "、";
-        }
-
-        &:last-child:after {
-          content: "";
-        }
-      }
-    }
-
-    @include assert() {
-
-      @include output {
-        @include list-separator();
-      }
-
-      @include expect {
-        &:after {
-          content: ",\a0";
-        }
-
-        &:lang(ar):after {
-          content: "،\a0";
-        }
-
-        &:lang(ja):after {
-          content: "、";
-        }
-
-        &:last-child:after {
-          content: "";
-        }
-      }
-    }
-
-  }
-
-  @include it("Provides the alternative separator correctly") {
-
-    @include assert() {
-
-      @include output {
-        @include list-separator(alternative);
-      }
-
-      @include expect {
-        &:after {
-          content: ";\a0";
-        }
-
-        &:lang(ar):after {
-          content: "\61b\a0";
-        }
-
-        &:last-child:after {
-          content: "";
-        }
-      }
-    }
-
-  }
-
-  @include it("errors on invalid separators") {
-    @include assert() {
-
-      @include output {
-        @include list-separator("invalid");
-      }
-
-      @include expect {
-        _error: "Unknown list separator 'invalid'";
-      }
-    }
-  };
-
-};