NIT: ```\.```:
```RewriteRule ^/(\w{2,3}(?:-\w{2})?/)?about/legal\.html$ /$1about/legal/ [L,R=301]```

I don't actually think it's that big of a deal that ```/about/legalXhtml``` would get redirected to ```/about/legal/``` instead of getting a 404 though, so I'm fine with leaving this as is.