You could mean either :

1) US freedom of speech, which is only freedom from government interference with political speech, and obviously US-only.

2) UN "international" freedom of speech. Has 2 major problems

* cannot actually be used to sue anyone for denying it, unlike the US law

* has been repeatedly judged to not even cover "muhammad is an asshole", despite that obviously being political speech in a third of the countries that signed it. Same goes of Chinese and EU politicians, EU royalty, Thai royalty, and a myriad of other cases.