delay translating the Chinese closed caption keys too
delay translating the Chinese closed caption keys too

We already set up all the other keys as getters but since the 2 Chinese
ones had to use string keys, I thought you couldn’t use the object
Initializer getter shorthand, but I guess it’s fine

Why? we still pay this price on every page load:
https://cl.ly/dc5e526e5989

Test plan:
* subtitles should work the same as they always have
* but you should not see that i18n.t call if you profile a page load

Change-Id: I81620f104cc630fc54ca27e3dcd8e4586766347a
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/214269
Tested-by: Jenkins
Reviewed-by: Ed Schiebel <0ca8a83847a5889cf05cb219c0ab09f6b646243b@instructure.com>
QA-Review: Ryan Shaw <ea3cd978650417470535f3a4725b6b5042a6ab59@instructure.com>
Product-Review: Ryan Shaw <ea3cd978650417470535f3a4725b6b5042a6ab59@instructure.com>

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