To students I say: it depends. Do not simplify complexity or jargon that is plot-pertinent or needed for characterization (Sheldon is Sheldon because he speaks incomprehensible -to some- science stuff). But do not choose complex syntax or obscure terms when there is no need to https://twitter.com/StavroulaSokoli/status/1176908277403279360

There is no one-size-fits-all in #subtitling, very few hard and fast rules (cpl mainly). It's about constant decision making, juggling with different factors, priorities and restrictions (citing @pzabalbe)