Generate text translation on Android
In the first/top field, enter the language that you want to translate from. To select a different input language, tap on the language icon (flag).
The second/bottom field will show the translated result. To select a different output language, tap on the language icon (flag).
Tap on the field and enter the text you would like to translate>>tap on "Translate".
To switch between the input/output language simply tap on the switch icon
.
Generate text translations on iOS
In the first/top field, enter the language that you want to translate from. To select a different input language, tap on the language icon (flag).
The second/bottom field will show the translated result. To select a different output language, tap on the language icon (flag).
You can use the swap icon 
to change between languages.