FEATURE: Support translated email track/watch commands (PR #11694)

The “like” command is translated into the user’s language, but track and watch are not.


Will I18n.t here be the author locale or the site locale?

probably site locale, but still I guess this is an improvement.

I am fine with this change but we need at least to expand the test a bit, has high chance of regression if we rename the key for example.

I support this change @riking feel free to resubmit with a backing test!