diff --git a/src/API.ts b/src/API.ts
index 6e69112..4d4b373 100644
--- a/src/API.ts
+++ b/src/API.ts
@@ -15,6 +15,7 @@ import {
   soundMap,
   // @ts-ignore
 } from "superdough";
+import { Speaker } from "./StringExtensions";
 
 interface ControlChange {
   channel: number;
@@ -1292,7 +1293,7 @@ export class UserAPI {
   // Speech synthesis
   // =============================================================
 
-  speak = (text: string, voice: number, rate: number = 1, pitch: number = 1): void => {
+  speak = (text: string, lang: string = "en-US", voice: number = 0, rate: number = 1, pitch: number = 1): void => {
     /* 
      * Speaks the given text using the browser's speech synthesis API.
      * @param text - The text to speak
@@ -1301,13 +1302,12 @@ export class UserAPI {
      * @param pitch - The pitch at which to speak the text
      * 
      */
-    const synth = window.speechSynthesis;
-    synth.cancel();
-    const utterance = new SpeechSynthesisUtterance(text);
-    utterance.voice = speechSynthesis.getVoices()[voice];
-    utterance.rate = rate;
-    utterance.pitch = pitch;
-    synth.speak(utterance);
+    const speaker = new Speaker({text: text, lang: lang, voice: voice, rate: rate, pitch: pitch});
+    speaker.speak().then(() => {
+      // Done speaking
+    }).catch((err) => {
+      console.log(err);
+    });
   };
 
   // =============================================================
diff --git a/src/Documentation.ts b/src/Documentation.ts
index 87d7dc7..933186d 100644
--- a/src/Documentation.ts
+++ b/src/Documentation.ts
@@ -1579,16 +1579,21 @@ mod(0.25) :: sound('sine')
 	
 # Speech synthesis
 
-Topos can also speak using [Web Speec API](https://developer.mozilla.org/en-US/docs/Web/API/Web_Speech_API)!
+Topos can also speak using the Web Speech API. Speech synthesis can be used in two ways:
 
-Speech synthesis can be used in two ways:
-
-- <icode>speak(text: string, voice: number, rate: number, pitch: number)</icode>: speak the given text.
+- <icode>speak(text: string, lang: string, voice: number, rate: number, pitch: number, volume: number)</icode>: speak the given text.
 
 Or by using string and chaining:
 
 - <icode>"Hello".rate(1.5).pitch(0.5).speak()</icode>.
 
+Value ranges for the different parameters are:
+- <icode>lang(string)</icode>: language code, for example <icode>en</icode> for English, <icode>fr</icode> for French or with the country code for example British English <icode>en-GB</icode>. See supported values from the [list](https://cloud.google.com/speech-to-text/docs/speech-to-text-supported-languages).
+- <icode>voice(number)</icode>: voice index, for example <icode>0</icode> for the first voice, <icode>1</icode> for the second voice, etc.
+- <icode>rate(number)</icode>: speaking rate, from <icode>0.0</icode> to <icode>10</icode>.
+- <icode>pitch(number)</icode>: speaking pitch, from <icode>0.0</icode> to <icode>2</icode>.
+- <icode>volume(number)</icode>: speaking volume, from <icode>0.0</icode> to <icode>1.0</icode>.
+
 Examples:
 
 ${makeExample(
@@ -1602,7 +1607,7 @@ mod(4) :: speak("Hello world!")
 ${makeExample(
   "Different voices",
   `
-mod(2) :: speak("Topos!",irand(0,25))
+mod(2) :: speak("Topos!","fr",irand(0,5))
   `,
   false
 )}
@@ -1628,6 +1633,22 @@ ${makeExample(
   false
 )}
 
+${makeExample(
+  "String chaining with array chaining",
+  `
+  const croissant = ["Croissant!", "Volant", "Arc-en-ciel", "Chocolat", "Dansant", "Nuage", "Tournant", "Galaxie", "Chatoyant", "Flamboyant", "Cosmique"];
+
+  onbeat(1) :: croissant.bar()
+    .lang("fr")
+    .volume(rand(0.2,2.0))
+    .rate(rand(.4,.6))
+    .speak();
+  
+  `,
+  false
+)}
+
+
 
 
 
diff --git a/src/StringExtensions.ts b/src/StringExtensions.ts
index d34839d..ecde428 100644
--- a/src/StringExtensions.ts
+++ b/src/StringExtensions.ts
@@ -11,44 +11,53 @@ declare global {
         pitch(pitch: number): string;
         volume(volume: number): string;
         voice(voice: number): string;
+        lang(language: string): string;
         options(): SpeechOptions;
     }
 }
 
-const speechOptionsMap = new Map<string, SpeechOptions>();
+const isJsonString = (str: string):boolean => {
+    return str[0] === '{' && str[str.length - 1] === '}'
+}
+
+const stringObject = (str: string, params: object) => {
+    if(isJsonString(str)) {
+        const obj = JSON.parse(str);
+        return JSON.stringify({...obj, ...params});
+    } else {
+        return JSON.stringify({...params, text: str});
+    }
+}
 
 export const makeStringExtensions = (api: UserAPI) => {
     String.prototype.speak = function () {
-        const options = speechOptionsMap.get(this.valueOf()) || {};
-        new Speech({ ...options, text: this.valueOf() }).say();
+        const options = JSON.parse(this.valueOf());
+        console.log("SPEAKING:", options);
+        new Speaker({ ...options, text: options.text }).speak().then(() => {
+            // Done
+        }).catch((e) => {
+            console.log("Error speaking:", e);
+        });
     };
 
     String.prototype.rate = function (speed: number) {
-        const options = speechOptionsMap.get(this.valueOf()) || {};
-        speechOptionsMap.set(this.valueOf(), { ...options, rate: speed });
-        return this.valueOf();
+        return stringObject(this.valueOf(), {rate: speed});
     };
 
     String.prototype.pitch = function (pitch: number) {
-        const options = speechOptionsMap.get(this.valueOf()) || {};
-        speechOptionsMap.set(this.valueOf(), { ...options, pitch: pitch });
-        return this.valueOf();
+        return stringObject(this.valueOf(), {pitch: pitch});
+    };
+
+    String.prototype.lang = function (language: string) {
+        return stringObject(this.valueOf(),{lang: language});
     };
 
     String.prototype.volume = function (volume: number) {
-        const options = speechOptionsMap.get(this.valueOf()) || {};
-        speechOptionsMap.set(this.valueOf(), { ...options, volume: volume });
-        return this.valueOf();
+        return stringObject(this.valueOf(), {volume: volume});
     };
 
     String.prototype.voice = function (voice: number) {
-        const options = speechOptionsMap.get(this.valueOf()) || {};
-        speechOptionsMap.set(this.valueOf(), { ...options, voice: voice });
-        return this.valueOf();
-    };
-
-    String.prototype.options = function (): SpeechOptions {
-        return speechOptionsMap.get(this.valueOf()) || {};
+        return stringObject(this.valueOf(), {voice: voice});
     };
 
     String.prototype.z = function () {
@@ -62,14 +71,16 @@ type SpeechOptions = {
     pitch?: number;
     volume?: number;
     voice?: number;
+    lang?: string;
 }
 
-class Speech {
+export class Speaker {
     constructor(
         public options: SpeechOptions
     ) {}
     
-    say = () => {
+    speak = () => {
+        return new Promise<void>((resolve, reject) => {
         if (this.options.text) {
             const synth = window.speechSynthesis;
             synth.cancel();
@@ -80,7 +91,32 @@ class Speech {
             if (this.options.voice) {
                 utterance.voice = synth.getVoices()[this.options.voice];
             }
+            if(this.options.lang) {
+                // Check if language has country code
+                if (this.options.lang.length === 2) {
+                    utterance.lang = `${this.options.lang}-${this.options.lang.toUpperCase()}`
+                } else if (this.options.lang.length === 5) {
+                    utterance.lang = this.options.lang;
+                } else {
+                    // Fallback to en us
+                    utterance.lang = 'en-US';
+                }
+            }
+
+            utterance.onend = () => {
+                resolve(); 
+            };
+        
+            utterance.onerror = (error) => {
+                reject(error);
+            };
+
             synth.speak(utterance);
+
+        } else {
+            reject("No text provided");
         }
+
+        });
     }
 }