Quick fix for hyperlinking between Play templates
Use Region magic to translate selections.
Use `translate` instead of `map` when calculating the selection for a given hyperlink.

It turns out that the translation scheme (and source map) for Play templates is a bit off, so
mapping a region of length 6 (for a given word) is mapped to way more (28 characters) in the
Scala source, making the hyperlink go widely off.