The Formosan languages are the branch of Austronesian language family spoken by the Taiwanese Aboriginal tribes (e.g. Rukai, Tsou, Atayal, Paiwan, etc.). All the languages in this branch, unfortunately, don't enjoy as much popularity as their sibling branch Malayo-Polynesian, largely due to centuries of language shift to various Chinese languages. More info regarding the Formosan language branch can be found in this Wikipedia page.
Any kind of contribution is welcome, either by posts of various resources or showcasing your knowledge of at least one Formosan language. Or maybe you can even make effective learning resources/pages/etc. out of the existing ones shared here!
If you find one or more links that are either dead or inaccessible, let me know! I will delete them from this thread.
I'll start by sharing this link of this Taiwanese government-owned online dictionary.
A Comparative Austronesian Vocabulary of Formosan Languages and Dialects by Naoyoshi Ogawa, ed. by Paul Jen-Kuei Li and Masayuki Toyoshima (2006)
This is an archive.org link of the book, which you can only borrow online for 14 days.
The Great Diversity of Formosan Languages by Paul Jen-kuei Li of Academia Sinica, a paper on Formosan languages with some example sentences and an extensive list of vocabulary which greatly showcase grammatical features of each language in the paper.
Wiktionary has this page of cognate sets for Formosan languages, with words from Rukai (5 dialects), the Duhtu dialect of Tsou, Kanakanabu, Saaroa, Puyuma (3), Paiwan (3), Amis (2), Sakizaya, Bunun (3), Atayal (2), Seediq (4), and Saisiyat (2).
The good ol' Austronesian Basic Vocabulary Database
The Austronesian Comparative Dictionary (web edition) by Robert Blust and Stephen Trussel. Contains an extensive list of vocabulary, but is also work-in-progress.
A grammar of Lha'alua, an Austronesian language of Taiwan, a PhD thesis by Chia-jung Pan. James Cook University, Australia.
Note: Lha'alua/Hla'alua is another name for Saaroa.
A few Taiwanese (Hokkien?) words and some place names in Taiwan originating from Formosan languages.
Formosan Languages Meet AI, a good blog entry from The Glossika Blog regarding Formosan languages and the future of them.
Taiwan Indigenous TV (TITV), a YouTube channel with news videos in Chinese and various local Austronesian languages (including Yami, the only Malayo-Polynesian indigenous Austronesian language in Taiwan), although several local languages, such as Thao, are unavailable. Still highly recommended for those who already understand Chinese or want to get an idea of how Formosan languages sound like.
Ogawa's Vocabulary of Formosan Dialects, an online dictionary database based on a book Comparative Vocabulary of Formosan Dialects, compiled by the late Dr. Naoyoshi Ogawa (1869-1947). By the time this was written (January 17th, 2018), the database is currently out of service. Let me know if the problem still persists after the date.
These Facebook pages post some vocabulary of Thao, Kanakanavu, and Saaroa respectively. (No updates since August 2017)
There's this Filipino kid chef called Chef Rafi who teaches you not just how to cook, but also languages (check out his YouTube channel as well for more cooking 'n' linguistic goodness).
Here, the particular language he uses is Atayal, with some English translation.
His blog post based on the video, including interlinear gloss as well!