* 8. Stop the player <br>
* 9. Destroy a handle <br>
* The TTS API also notifies you (by callback mechanism) when the state of TTS is changed,
- * utterance is started and completed, default voice is changed or an error occured.
+ * utterance is started and completed, default voice is changed or an error occurred.
* An application should register callback functions: tts_state_changed_cb(), tts_utterance_started_cb(),
* tts_utterance_completed_cb(), tts_default_voice_changed_cb(), tts_error_cb(), tts_engine_changed_cb().
*