i18n files

Looking to create i18n files w/ key value pairings for english and french and display on their appropriate channels...

example: 

my-french-i18n.file
-----------------
my.header = my french translation


my-english.i18n.file
------------------
my.header = my english translation

Then in the razor file, something like
------------------
<p>i18n['my.header']</p>
or
<p>i18n.getValueByKey('my.header')</p>

Cant seem to find docs on this aywhere...
How does this work in episerver?
Can someone point me in the right direction?

Thanks,

CC