Using a Foreign Language And Voice Options

Using a foreign language is very easy. You just need to load the language dependent files and set the corresponding voice:

#include "AudioTools.h" // https://github.com/pschatzmann/arduino-audio-tools
#include "FileSystems.h" // https://github.com/pschatzmann/arduino-posix-fs
#include "espeak.h"

I2SStream i2s; // or replace with AudioKitStream for AudioKit
const bool load_english = false;
ESpeak espeak(i2s, load_english);

void setup() {
  Serial.begin(115200);

  // add foreign language configuration file
  espeak.add("/mem/data/de_dict", espeak_ng_data_de_dict,espeak_ng_data_de_dict_len);
  espeak.add("/mem/data/lang/de", espeak_ng_data_lang_gmw_de, espeak_ng_data_lang_gmw_de_len);
  // add an optional voice
  espeak.add("/mem/data/voices/!v/Alicia", espeak_ng_data_voices__v_Alicia, espeak_ng_data_voices__v_Alicia_len);

  // setup espeak
  espeak.begin();
  // Set voice and voice option
  espeak.setVoice("de+Alicia");

  // setup output
  audio_info espeak_info = espeak.audioInfo();
  auto cfg = i2s.defaultConfig();
  cfg.channels = espeak_info.channels; // 1
  cfg.sample_rate = espeak_info.sample_rate; // 22050
  cfg.bits_per_sample = espeak_info.bits_per_sample; // 16
  i2s.begin(cfg);
}

void loop() {
  espeak.say("Hallo Welt!");
  delay(5000);
}

Here is the list of all language configuration files that are available.