Following this question, why are Romulans using warp scale for speed when it’s clearly a Federation unit? They do so in many episodes (for example in "Face of the enemy"), while at the same time using onkians (a clearly Romulan unit) for temperature (for example in "The Defector").
Are they using the same scale as the Federation or their own? And what is going on with this at all? Somehow I can't imagine any species or nation using one scale for some measurements and a different (alien?) scale for others. This just doesn't make any sense.