diff --git a/i18n.js b/i18n.js
new file mode 100644
index 0000000..f7941d1
--- /dev/null
+++ b/i18n.js
@@ -0,0 +1,166 @@
+/*
+    Internationalization Class for JavaScript
+    Copyright (C) 2018 Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, version 3 of the License.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+let group = "i18n";
+let group_style = "font-weight: bold;";
+let text_style = "font-weight: inherit;";
+
+class I18n {
+    /** Create a new object, ready to be used.
+     * 
+     * @param {string} urlFormat URL from which to asynchronously load translation data from in the format 'url/file{0}.extension' ({0} is replaced by the lowercase language name).
+     */
+    constructor(urlFormat) {
+        console.log("%c[%s]%c Initializing ...", group_style, group, text_style);
+        if (typeof(urlFormat) != "string") {
+            throw "urlFormat must be of type string";
+        }
+        this.url = urlFormat;
+        this.languages = {};
+        this.languages.base = '';
+    }
+
+    _sanitizeLanguage(language) {
+        if (typeof(language) != "string") {
+            throw "language must be of type string";
+        }
+        return language.toLowerCase();
+    }
+
+    /** Load a new language.
+     * 
+     * @param {string} language Name of the language file.
+     * @param {boolean} isBaseLanguage Use this language as the new base language.
+     * @returns {Promise}
+     */
+    load(language, isBaseLanguage) {
+        language = this._sanitizeLanguage(language);
+        if (isBaseLanguage == true) {
+            this.languages.base = language;
+        }
+        if (this.languages[language] == undefined) {
+            return new Promise((resolve, reject) => {
+                let self = this;
+                let url = this.url.replace('{0}', language);
+                console.debug("%c[%s]%c Loading language '%s' from url '%s'...",
+                    group_style, group, text_style,
+                    language, url);
+
+                let req = new XMLHttpRequest();
+                req.addEventListener("error", function (event) {
+                    console.log("%c[%s]%c Failed to load language '%s': ",
+                        group_style, group, text_style,
+                        language, event);
+
+                });
+                req.addEventListener("progress", function (event) {
+                    let prc = event.loaded / event.total;
+                    if (event.loaded == event.total) {
+                        prc = 100.0;
+                    }
+                    if (event.total == 0) {
+                        prc = 0.0;
+                    }
+                    console.debug("%c[%s]%c Loading language '%s'... [%6.2f%%]",
+                        group_style, group, text_style,
+                        language, prc);
+                });
+                req.addEventListener("load", function (event) {
+                    console.debug("%c[%s]%c Parsing language '%s'...",
+                        group_style, group, text_style,
+                        language);
+                    try {
+                        self.languages[language] = JSON.parse(req.responseText);
+                    } catch (e) {
+                        console.log("%c[%s]%c Failed to load language '%s': ",
+                            group_style, group, text_style,
+                            language, e);
+                        reject(e);
+                        return;
+                    }
+                    resolve(true);
+                    console.log("%c[%s]%c Loaded language '%s'.",
+                        group_style, group, text_style,
+                        language);
+                    return;
+                });
+                req.open("GET", url);
+                req.overrideMimeType("text/plain; charset=utf-8");
+                req.send();
+            });
+        } else {
+            console.log("%c[%s]%c Loaded language '%s'...",
+                group_style, group, text_style, language);
+            return new Promise((resolve, reject) => { resolve(true); });
+        }
+    }
+
+    /** Translate a single string to any loaded language.
+     * 
+     * @param {string} string String to translate
+     * @param {string} language Language to translate to
+     * @return {string} Translated string, or if failed the string plus the language appended.
+     */
+    translate(string, language) {
+        language = this._sanitizeLanguage(language);
+        if (typeof(string) != "string") {
+            throw "string must be of type string";
+        }
+        let str = this.languages[language][string];
+        if (str == undefined) {
+            let str = this.languages[this.languages.base][string];
+            if (str == undefined) {
+                console.error("%c[%s]%c Language '%s' and base language '%s' contain no translation for '%s'.",
+                    group_style, group, text_style,
+                    language, this.languages.base, string
+                )
+                return string + language;
+            } else {
+                console.debug("%c[%s]%c Language '%s' contains no translation for '%s', falling back to base language '%s'.",
+                    group_style, group, text_style,
+                    language, string, this.languages.base
+                )
+                return str;
+            }
+        } else {
+            return str;
+        }
+    }
+
+    /** Automatically translate the entire page using the specified property on elements.
+     * 
+     * @param {*} language Language to translate to
+     * @param {*} property Property to search for (default 'data-i18n')
+     */
+    autoTranslate(language, property = 'data-i18n') {
+        language = this._sanitizeLanguage(language);
+        return new Promise((resolve, reject) => {
+            console.debug("%c[%s]%c Starting automatic translation to language '%s'...",
+                group_style, group, text_style,
+                language);
+            let els = document.querySelectorAll(`[${property}]`);
+            for (let el of els) {
+                let string = el.getAttribute(property);
+                el.textContent = string;
+                el.textContent = this.translate(string, language);
+            }
+            console.log("%c[%s]%c Translated to language '%s'.",
+                group_style, group, text_style,
+                language);
+        });
+    }
+}