Speach synthesizer too fast and not adjustable

I just purchased and tested with my Brazilian-native wife. The translations are reasonably good, as is the pronunciation. However, for Brazilian ears, the speach synthesized is far too fast and difficult to understand. The good news is that Portuguese spelling is relatively phonetic. So if you read the translation yourself, most people will likely understand it. Developers - Congrats on a very useful app. Please add a speed control.

Micky F about iSpeak Portuguese, v2.2.1