Re: using a samsunh gt-19060 about language and imput.
Welcome to Android Central! If you go to Settings>Language and select System Language, is French there? If not, you might not be able to add French unless you root the device. Samsung devices are odd in that the languages that are available on their devices can be limited (depending on the region), and they don't make it easy to add more. You might have to root the phone if you can't find French in the list. See if the steps here help--I know the article is for the S4, but it should be pretty similar to your phone: How to change languages on the Samsung Galaxy S4 | Android Central