This is how I’ve prepared my Trekinetic for flights where airport staff will handle it multiple times.
At the airplane door, they take it while it’s locked. Then they unlock it to move it into storage inside the aircraft, lock it again once it’s in place and finally unlock it after landing to bring it back to the airplane door.

There are several lock/unlock steps during the journey and I need a way to make these instructions instantly clear – even for staff who don’t speak English.

This worked on my flight from Lisbon to the US, but I’m not sure it will keep working, especially when flying to countries where English isn’t widely spoken.

Has anyone found a way? Or any other suggestions for handling this?
It’s a big issue – I’ve even changed my travel plans because I’m afraid they might damage the wheelchair.