With `t`, everything ending in `html` (so `key_html` or `key.html`) is html safe when used in a view, see http://guides.rubyonrails.org/i18n.html#using-safe-html-translations From what I've read, this applies only when `t` is used in views, so I'm not completely sure this could help us here (`concat t(:key_html)` would probably work, but I haven't tried it).

The better way would probably be to use `concat` anyway instead of "adding strings", but that's for a later refactor. I'll add a TODO for that.