In fact, "One Piece" has never been the official translation, it is just the earliest translation known to the public. However, at that time, the official comics and animations of "One Piece" had not entered the country, so there was no official confirmation of the name. .
But the official name is not sure, so we have to have a name. The folk Chinese translation group translated it into "One Piece", and it has gradually become known to the public. Basically, domestic audiences only need to hear "One Piece" "One Piece" knows that it is the work "One Piece".
So a loophole came out. Before the official government entered our country, some companies that specialized in trademark registration came to register the work "One Piece". Of course, it was just a name, not this. This work was snatched away, but it still caused misunderstandings among many viewers.
When the Japanese official of "One Piece" finally entered the domestic market belatedly, the name "One Piece" had been maliciously registered and was protected by law. Therefore, "One Piece" That is to say, the official name of "Onepiece" can only be changed to "One Piece".
It is the same as the "Jing Hanqing" name squatting incident some time ago. It was maliciously registered by some companies when it first became popular and the parties involved were not aware of it. And use this to blackmail, because this industry is protected by law and has been successful many times, so it still exists today.
There was an outbreak at the time of Jing Hanqing. Most people in China hated these leather bags companies. These malicious squatters may modify some things later, but there are always loopholes.
The name "One Piece" was a squatting incident that occurred before this. Other famous ones include misunderstandings caused by translations of "Pocket Monsters", "Pokémon", "Pokemon", etc. Therefore, the name of this "Pokemon" was later changed to "Pokémon", which was directly changed to a transliteration.
There are many reasons why trademark disputes break out. We should learn to protect ourselves and register in advance.