I'm sorry, I must've misunderstood you. You weren't talking about using foreign terms when domestic ones would do, but pronominal paradigms with strange hijinks? I think most of the European lgs did it.

German

du / Ihr ~ Sie / Sie
where ihr is youse informal and her, and sie is she, they, and you formal sg/pl.

In English, lawspeak we use Your Honor and 3PS. Go figure.