#20 Migration null-absence
Layer #20 of 28 in stack order — supersedes 19 layers beneath it · Kind: concept_map
Programming languages
ada, applescript, assembly, c, carbon, clojure, cobol, common_lisp, cpp, crystal, csharp, d, dart, elixir, elm, emacs_lisp, erlang, fsharp, gdscript, gleam, glsl, go, groovy, hack, hare, haskell, java, javascript, jsx, julia, kotlin, lean, lua, mojo, nim, objc, ocaml, odin, pascal, perl, php, powershell, python, q, r, racket, raku, ruby, rust, scala, scheme, smalltalk, solidity, sql, standard_ml, swift, typescript, verilog, vhdl, visual_basic, vlang, zig
Concepts
5
Language-term bindings
115
Added
2026-06-24
AI council review available for 187 locales (1 model so far) — see individual leaves.
Locale coverage
Locales whose leaf for this migration carries at least one form (count = concepts with a form). This is the whole-brain view: a locale absent here simply has no form from this migration — canonical English stands there until a future migration covers it.
af 5 af-Arab 5 afb 5 ak 5 am 5 apc 5 ar 5 ary 5 arz 5 as 5 awa 5 awa-Kthi 5 ay 5 az 5 az-Arab 5 az-Cyrl 5 be 5 be-Latn 5 bg 5 bho 5 bho-Kthi 5 bn 5 bo 5 ca 5 ceb 5 cs 5 cy 5 da 5 de 5 el 5 es 5 et 5 fa 5 ff 5 ff-Adlm 5 ff-Arab 5 fi 5 fj 5 fr 5 ga 5 gn 5 gu 5 ha 5 ha-Arab 5 hak 5 hak-Latn 5 haw 5 he 5 hi 5 hmn 5 hmn-Hmng 5 hmn-Hmnp 5 hne 5 ht 5 hu 5 hy 5 id 5 ig 5 is 5 it 5 ja 5 jv 5 jv-Java 5 ka 5 kg 5 kk 5 kk-Arab 5 kk-Latn 5 km 5 kn 5 ko 5 ko-Hani 5 kok 5 kok-Knda 5 kok-Latn 5 kok-Mlym 5 ku 5 ku-Arab 5 ku-Cyrl 5 ky 5 ky-Latn 5 lb 5 lg 5 ln 5 lo 5 lt 5 lv 5 mad 5 mad-Arab 5 mad-Java 5 mai 5 mai-Tirh 5 mg 5 mg-Arab 5 mi 5 mk 5 ml 5 mn 5 mn-Mong 5 mr 5 ms 5 ms-Arab 5 mwr 5 mwr-Mahj 5 my 5 nah 5 nan 5 nan-Latn 5 ne 5 nl 5 no 5 ny 5 om 5 or 5 pa 5 pa-Arab 5 pcm 5 pl 5 ps 5 pt 5 qu 5 quc 5 rn 5 ro 5 ru 5 rw 5 sd 5 sd-Deva 5 sh 5 sh-Cyrl 5 si 5 sk 5 skr 5 skr-Mult 5 sl 5 sm 5 sn 5 so 5 so-Arab 5 so-Osma 5 sq 5 st 5 su 5 su-Sund 5 sv 5 sw 5 sw-Arab 5 syl 5 syl-Sylo 5 ta 5 te 5 tg 5 tg-Arab 5 th 5 ti 5 tk 5 tk-Cyrl 5 tl 5 tl-Tglg 5 to 5 tpi 5 tr 5 ty 5 tzm 5 tzm-Arab 5 tzm-Latn 5 ug 5 ug-Cyrl 5 ug-Latn 5 uk 5 ur 5 uz 5 uz-Cyrl 5 vi 5 wo 5 wo-Arab 5 wo-Gara 5 wuu 5 xh 5 yo 5 yo-Arab 5 yua 5 yue 5 yue-Hans 5 zh 5 zh-Hant 5 zu 5
No 20 forms in 25 of 212 brain locales — canonical English stands there.
List those locales
br bs cnr cnr-Cyrl dsb en-GB en-US eu fo frr fy gd gl hr hsb nds oc rm rmo rom se sr sr-Cyrl stq tl-Tagb
Leaves
115 language-term bindings across 5 concepts — all of them browsable below.
- clojure/nil nil
- common_lisp/nil nil
- crystal/nil nil
- elixir/nil nil
- emacs_lisp/nil nil
- erlang/nil nil
- gleam/Nil nil
- go/nil nil
- lua/nil nil
- nim/nil nil
- objc/nil nil
- odin/nil nil
- pascal/nil nil
- ruby/nil nil
- smalltalk/nil nil
- swift/nil nil
- carbon/Optional none
- elm/Nothing none
- fsharp/None none
- gleam/None none
- hare/nomem none
- julia/missing none
- lean/none none
- mojo/None none
- nim/none none
- ocaml/None none
- python/None none
- r/NA none
- rust/None none
- scala/None none
- standard_ml/NONE none
- vlang/none none
- ada/null null
- applescript/null null
- c/NULL null
- cobol/NULL null
- common_lisp/null null
- cpp/nullptr null
- csharp/null null
- d/null null
- dart/null null
- emacs_lisp/null null
- fsharp/null null
- gdscript/null null
- groovy/null null
- hack/null null
- hare/null null
- haskell/Nothing null
- java/null null
- javascript/null null
- jsx/null null
- julia/nothing null
- kotlin/null null
- objc/NULL null
- php/null null
- q/null null
- r/NULL null
- racket/null null
- raku/Nil null
- scala/null null
- sql/NULL null
- typescript/null null
- verilog/null null
- vhdl/null null
- visual_basic/Nothing null
- zig/null null
- erlang/undefined undefined
- haskell/undefined undefined
- javascript/undefined undefined
- jsx/undefined undefined
- julia/undef undefined
- perl/undef undefined
- r/NaN undefined
- raku/Any undefined
- typescript/undefined undefined
- zig/undefined undefined
- assembly/VOID void
- c/void void
- common_lisp/values void
- cpp/void void
- crystal/Void void
- csharp/void void
- d/void void
- dart/void void
- emacs_lisp/void void
- fsharp/unit void
- gdscript/void void
- glsl/void void
- groovy/void void
- hack/void void
- hare/void void
- java/void void
- javascript/void void
- jsx/void void
- julia/Nothing void
- kotlin/Unit void
- lean/Unit void
- nim/void void
- objc/void void
- ocaml/unit void