The Family Book (Book Report) is available in the following languages:
English US
English UK
Italian
Dutch
Norwegian
Portuguese
Portuguese Brazil
Swedish
German
Spanish
French
If your tree is not in one of these languages, you will not see the option to create a Family Book on your family site.
If you are using Family Tree Builder software, you can create a Family Book in English even if you built your tree in another language not supported by the Family Book feature.