# Polyglossia vs Babel

Could someone summarize features which are (1) common and (2) different for the babel and polyglossia packages? I know that babel 3.8 (current version) fails to run for some languages (eg, Russian) under LuaLaTeX and XeLaTeX (at least it was so 2 years ago). What will be the future of the polyglossia package if babel 3.9 (which is now babel-alpha) will manage to work with XeLaTeX? Will be any sense to use polyglossia as a replacement of babel in that case?

UPDATE: I am sorry for mixing several questions in one post. Main question was about differences between polyglossia and babel. For example, polyglossia has options specific to some languages.

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