Instead of sticking rigidly to your face, the text "drifts" or lags behind your head movement slightly. This feels more natural and reduces the "HUD" eye-strain effect.
See What We Said? ‘Vacation Simulator’ Subtitles Update + ... - Meta subtitle Oculus
How do the pros do it? Developers like Owlchemy Labs ( Vacation Simulator ) and the BBC have pioneered several methods: Instead of sticking rigidly to your face, the