Uruwi's Arka portal
The official Arka website is no longer maintained (it seems), but it's a good resource for people who want to learn about Arka.
The Vulgar Arka dictionary is still updated (albeit in Japanese); this is the dictionary you should be using.
Kakis Erl Sax's wiki is a great place for historical Arka materials if you can read Japanese.
What to watch out for
Also see this page of common mistakes.
Things that aren't mentioned in the official site, at least not well.
ois used before a word starting with a consonant. ontcomes before a vowel-initial word.
- If you want to relativise an object of a preposition (here, we use "preposition" for what the official site calls "casers"), the preposition should be put at the end of the clause, as done in English while trying to piss prescriptivists off. The city in which we live is translated, for instance, as
haim l'ans ra ka(city rel= 1pllive in). Omitting the preposition is also acceptable. See this page for more details.
- Speaking of which, relativising genitives isn't so straightforward. The above site translates a friend whose father is a teacher as
hacn le til kaan lex xaxan(friend relhave father as teacher). What should you do if the clause uses some other verb? Beats me.
- You might be confused about "turning conjunctions into casers". In short, a preposition (note: we're not including
e, which is special) can modify only a verb by default. Attaching -enallows it to modify a noun instead.
What happened to Seren Arbazard?
The relevant news article was taken down, but here's an archive link (Japanese). I'll leave it at that.