No it doesn't: you just told me to "choose a language". It's 2017, why would I choose a language when I can just use all the languages with XeLaTeX, using:

   \usepackage{fontspec}
   \setmainfont{Noto Sans}

and that solves that problem. I can write whatever I want, and stick in lang-specific context switches using \usepackage{ucharclasses} (for making sure macros are inserted for transitions to/from specific unicode blocks) only once I absolutely need them, and no earlier.