Jack Douglas
This doesn't need to be exhaustive yet, just some basic tags to get us going, including language, language version (using implied tags) and other tags that will cover common filtering and searching needs .

Top Answer

Adám
# Initial tags
* algorithm
* apl-iv
* apl-plus
* apl2
* apl64
* aplbug
* aplx
* april
* array
* array-model
* array-programming
* article
* audio
* baa
* based-array-model
* bqn
* bug
* co-dfns
* code-review
* community
* dfns
* dialect
* dyalog-apl
* dzaima-apl
* error
* extended-dyalog
* extension
* flat-array-model
* function
* gnu-apl
* history
* hobby-implementation
* implementation
* interop
* j-lang
* julia
* k-lang
* leading-axis-theory
* mathematica
* matlab
* nars2000
* nested-array-model
* ngn-apl
* numpy
* octave
* oop
* operator
* performance
* point-free-programming
* primitive
* publication
* q-lang
* syntax
* system-command
* system-function
* tacit-programming
* teaching
* total-array-ordering
* user-command
* video

Answer #2

RikedyP
https://aplwiki.com/wiki/Category:Paradigms
- Based array model
- Flat array model
- Nested array model
- Leading axis theory
- OOP
- Tacit (point-free) programming
- Total Array Ordering
I think we have plenty in this thread to form a basis, so let's refine the list and then can we make this place public soon?

Answer #3

RikedyP
Yeah are we gonna go hard with the dialects?
- dzaima/APL
- ngn/apl
- BQN