I know nothing of any pure APL for p9 or related systems,

but theres A+:

which is GPLed, so could, theoretically, be ported.

On Sep 06, 2018, at 02:43 PM, Ethan Gardener <eekee57@fastmail.fm> wrote:

Is there an implementation of APL or a related language for Plan 9?

--
The lyf so short, the craft so long to lerne. -- Chaucer