If you prefer to use one iOS keyboard for all languages you speak, Proloquo4Text allows you to manually configure the languages in the Options, and will show a Language Toggle Proloquo4Text 32Px Icon Languagetoggle to allow you to switch between languages.  

For either option:

  1. Go to Options Proloquo4Text 32Px Icon Options in the toolbar.
  2. Go to Language and Speech.
  3. Go to Manage Languages. Toggle Automatic to ON to automatically detect language based on keyboard, or OFF to manually control languages using the Language Toggle Proloquo4Text 32Px Icon Languagetoggle.