Actually the Xbox app just does this by default with everything. A developer has the option to make this not happen by simply not distributing the game in other languages, or by preparing a single version of the game that contains all language files.
Both of these options are decisions they would have had to make 15 years ago, based on a psychic prediction that a single future platform would invent an arbitrary requirement to only allow you to distribute your games in the worst possible way.
Worth noting, if they somehow had seen this coming and chosen to do this, it would’ve meant that fallout 3 would’ve been a (if I did my math right) 16 gig game in 2008 and thus on Xbox 360 would necessarily have been distributed across no less than 3 discs, because game discs which were allocated a mere 7.3 gigs at the time and would have required a hard drive. If you had one of the Core or Arcade models with no hard drive, hopefully you remembered to buy a hard drive while you were at the store.
Nooooo don’t you understand??? That would take effort! Our little engineerinos must spend all their time on profit-generating features!