عمل واجهة بلغتين بال JSF موصولة بقاعدة بيانات

يجب عليك عمل ملفات properties وتحديد اللغات وتعريف هذه الملفات داخل ملف الـ web.xml

You can use "localization" tool to save your screen wards in each language you want, 

if you want to save these wards in database you must specify a certain columns for names in languages you want

create session bean and make a local variable in it with the name LanguageId

when user log in let him choose from select menu then put the variable's value with his choice

()when you load page call method sessionBean.getLanguageId

So you can retrieve data from database based on user's LanguageId