"Entire fleet" might indicate "worldwide" too.
For example, voice recognition iirc is only available in english so no one outside US/UK can use it for Sat Nav.
Or you need to say "quarante-neuf (49) avenue des Champs-Elysées, Paris" with an insane US accent "forty-nine avenew day tchenz-hey-liz-hey, pairissss"
Getting it compatible with 50+ spoken languages like Waze or Google Maps is quite a task.
Same goes with reading speed signs for autopilot: they come in different shape and different colors of background vs. fonts in every country.
Some are located on the right side of the road (EU), some on the left side (UK), sometimes they are 5 meters above the road on bridges.
And then you have white lines on the ground, either right or left. And sometimes they are yellow, not white. And sometimes they have strong reflective green mirrors included every five meters which may disturb readings.
E.