I know that a lot of these are "inherited" from the country of manufacture of the aircraft , but for safety and ease of use I have always been surprised that there is no standardisation.
Why are they different, Choxolate?
Envy...and as a result, others have to be different.
Why envy?
Simply because, where aviation (in general) is concerned, the USA (and not to forget the UK in many areas) have more or less dominated the world for many many years in design and manufacture of aircraft, and others, are just so darn pi**ed off about this, that they just have to be 'different'.
Especially the 'metric' crowd, and those that follow it.
The 'mass' (instead of 'weight') folks, or 'inches/feet is outdated' crowd will never be satisfied, and that is truly their collective problem...pure unadulterated envy, and their burden.
I really do have to laugh about this whole affair.