[luatex] writing direction

[Herbert Voss]

In the current Lua documentation I found

LuaTEX only understands 4 of the 16 direction specifiers of Aleph: TLT 
(latin), TRT (arabic), RTT
(cjk), LTL (mongolian). All other direction specifiers generate an error 
(LuaTEX 0.45).

is this still correct for the current version?

Herbert