Crossword puzzle clue "you might learn a new language to write one"

You might learn a new language to write one

"To write is to write is to write . . ." writer

Language once rumored to have a ton of words for snow (although it's not technically one language, it's a language family)

Might play one when you learn the guitar

Something your poetry teacher might assign you to write about a particularly inspirational poetry teacher you've had *hint* *hint

He sang (but did not write) "I Write the Songs"

It may be used to write down a write-off

Class where you might learn about class, informally?