Time to learn another language then mix them

Siu Mit USA De Fa Si Si Zu Yi
The Only Good Fa Xi Si Zu Yi Ze Hai Sei Zo Ge

(Destroy fascism in the USA
The only good fascist is a dead one)

Now just need to transpose that and replace some characters. Of course, making it offline would greatly reduce government/corporate surveillance threats. As long as your family aren’t cryptographers, they won’t be able to decrypt it.

(Its Tri-Lingual. Cantonese Jyutping, Mandarin Pinyin, and English of course. Romanization of characters makes it harder to guess words especially when it gets transposed with a bunch of others.)