There have never been any legal cases involving fan translation issues, and such projects have been relatively widespread over the Internet for years
the patch only contains the new data and directives for where it is to be placed, and does not have the original copyrighted material included in any form.
he already release this english patch fan translations. but the fixed is copyrighted?
WTF!
https://www.technollama.co.uk/are-fan-translations-an-infringement-of-copyright
Whole website got shutdown because of it.
However, in 1999, one well-known incident in which copyright holders took action involved the translation of a Windows game maker called
RPG Maker 95. The Japanese company
ASCII had their
lawyers send a cease and desist e-mail to the translation group KanjiHack Translations. However, unlike most translation groups, KanjiHack was caught linking to a site to illegally download the entire then-recently released RPG Maker 95 software (including a copy-protection crack).
[11] The group shut down immediately but others eventually finished the project. Titles from the
RPG Maker series were eventually localized and officially released in the US for the
PlayStation and
PlayStation 2.
In 2014, publisher
Square Enix issued a cease and desist order to Sky, a romhacker who had completed a highly anticipated
[12] fan translation of the PSP game
Final Fantasy Type 0, soon after they announced an HD version of the game for
PlayStation 4 and
Xbox One. This forced him to remove all posts and pages pertaining to the project (which were eventually restored months later). Sky claimed that Square Enix had made "threats and false accusations".
[13] According to
Kotaku, Sky had released the translation early against the team's wishes, possibly to preempt any legal action following a localization announcement at
E3, and Square Enix may have been forced to announce the HD version prematurely as a reaction to the patch's release.
[14]
https://en.wikipedia.org/wiki/Fan_translation_of_video_games
EDIT: GBAtemp wish not to be part of the a battle that can end up in court.