I just ot my new S8 phone and was pretty disappointed to find out it does not support the Belgian keyboard layout. It seems that you are only able to select a language (Dutch) but this default the keyboard layout of the Netherland - not the Belgian. Support suggested to download the google keyboard, which has less functionality but is able to use an Azerty layout.
Pretty odd that samsung sells phones in a country but does not support the correct keyboard layout. Can you make a language file "Dutch (Belgium)" with the Dutch language and the Azerty keyboard layout?