Add translation to language files

[Stranik (Evgeny)]

When translating, I was faced with the fact that there is no translation in the language file. Looked and found this.

https://github.com/discourse/discourse/blob/master/app/assets/javascripts/admin/templates/components/watched-word-uploader.hbs#L7

Thank you!

[zogstrip (Régis Hanol)]

@neil looks like you forgot to i18n that component

[neil (Neil Lalonde)]

Oops! Fixed. It should show in Transifex soon.