Speak & Translate offers a big amount of languages for speech or text translation and offers you a possibility to create lots of languages combinations.
To change the languages tap or drag up the bottom button between the two flag-buttons.
This will open languages list. Now all you need to do is to tap the language you want to change and then tap any language from the list.
To start translation - drag the button between the flags down and then tap one of the flags.
If you have any questions - please let us know at firstname.lastname@example.org