Need some info about es

i considering using your search engine but i need to know some information about it :
first can i use it as offline engine for cd's or ebooks ?

i really like you search engine that used in the user milling list is it elesticsearch engine and can i make something like it in the same engine ?

does support arabic highlighting diacritic insensitive search result like arabic text ?

for example when search for : الْحَمْدُ لِلَّهِ رَبِّ الْعَالَمِينَ

the result would find and highlight both type :

diacritic :الْحَمْدُ لِلَّهِ رَبِّ الْعَالَمِينَ

not diacritic :الحمد لله رب العالمين

thank you