Google is preparing for a landmark privacy decision at the European Union’s top court on the “right to be forgotten” globally.

The “right to be forgotten” was established in 2014 when the European Court of Justice said links to irrelevant and outdated material in Europe should be erased from searches on request.

Google has so far had to weigh nearly 850,000 separate requests to remove links to some 3.3 million websites, and as a result offers different search results in Europe than the rest of the world.

The European Court of Justice will decide on Tuesday if the ruling should apply globally and where to draw the line between privacy and freedom of speech.

A French data protection regulator has ordered that all links that contain false information about a person or could unfairly harm their reputation should be removed on all of Google’s platforms across the world.

The search giant has challenged the regulator on the issue, and has raised concerns about censorship.

“The case highlights the continuing conflict between national laws and the internet, which does not respect national boundaries,” said Richard Cumbley, a lawyer at Linklaters in London.

A ruling applying the right to be forgotten worldwide “would create a serious clash with U.S. concepts of freedom of speech and other states might also try and suppress search results on a global basis reducing Google’s search engine to a list of the anodyne and inoffensive.”