Via Language Hat: Borgesian pronouns in Malay, including table rows such as "Malay commoner or raja to older raja" and "Persons to Chinese".

The Japanese radio alphabet! I thought it was weird at first that there were a few English (?) terms in there ("the ra of radio" (rajio), "the ku of club" (kurabu), etc.), but then I remembered: "alpha", "bravo"... d'oh!

Note that since there are no Japanese words that start with ん n, it's known as "oshimai no n", or "the n of endings" or "final n".

Other Japanese voice-only alphabets here! Semaphore here!

Via Emily: kanji with insanely high stroke counts. I've addressed this issue before, but the most complicated character from my dictionary was 䯂, which has a measly thirty-four strokes.

Commenters found bigger ones, including the triple dragon (龘, forty-eight strokes) and a quadruple dragon (sixty-four strokes), but Emily's discovery includes a Japan-made kanji so vast that I can only represent it approximately, by stacking other kanji:

雲
雲雲
龍
龍龍

Cloud, cloud cloud, dragon, dragon dragon. That's not a character, it's a lifestyle. It takes eighty-four strokes to write. That's more than it takes to write the entire Roman alphabet.

Its reading is apparently otodo, taito or daito, all of which mean some variant on "big city"/"important dwelling", and it is said to be used as a surname. (This is part of a much larger site entitled "Dictionary of Japan-made kanji", which looks like it could be very interesting indeed.)

However, no-one is able to confirm that this character definitely exists, which is why the site offers another candidate for largest kanji status. I'm not even going to get into that one. Let's just say it's an Edo-period joke about vomiting.