Change Languages in Google Chrome?

1. from the hotdog menu at the upper right pick "Settings"
2. pick "Show advanced settings.."
3. click "Language and input settings..." under a "Languages" subsection partway down the page to open a "Languages" modal
4. there is an "Add" button here for adding new languages and you may click on different languages in a list to make them do different things such as be a default or be used in spell checking

In experimenting with this today I tried to test through Chrome but I couldn't get Frenchy Chrome to trigger Frenchy content. Sigh. Maybe I needed to restart my browser after changing up settings. I don't know.

Addendum 10/12/2014: Yes, you must close and reopen Chrome to see the effect of the change of language.