Decentralised will be agreeable in Europe, Britain and former British colonies like Australia, NZ, in SE Asia, India, Africa, etc. so maybe not as limited as karmaco says. However with tech-related terms, American English is probably more prevalent. Like karmaco says, it weakens the name. Just don’t know how much. Maybe search on Sedo for decentralised and see what list prices come up. It’s a hot term so you might be able to ride that wave.