Useful resources
- Frater: The Simplest International Language Ever Constructed by Pham Xuan Thai, Internet Archive.
- Frater: The Simplest International Language Ever Constructed by Pham Xuan Thai, Scribd.
- Legabasi ot Nasion Uni (Charter of the United Nations in Frater) (pdf), Scribd.
- Lingua Sistemfrater (Excite Blog), a blog about Frater by Igor Wasilewksi (English and Frater).
- Frater, a blog about Frater by Gary (English).
- Blog in Frater, a blog in Frater by Jacint (Frater).
- Lingua Sistemfrater: A forgotten IAL, a group in Reddit.
- Wikis: Frater in Wikipedia, Fandom (Portuguese) and Ideopedia (French).
- Frater in Twitter, by Igor Wasilewski (Frater).
-
Frater2, revision of Frater by Paul O'Barlett.
Other interesting conlangs