Question about language system

[whereisapi]

Hi there,

Just a question about the language system and how it works, trying to optimize things here..

I see the phrase table in the database, I also see serialized arrays in the language table. Are languages drawn directly from the database? Or are they magically cached on file and read from there?

Further, is the language fetch done every page hit, or does it get stored into session somehow?

Thanks for any insight you can offer!