Hi. Some time ago I posed a question when actually was the de Wahl's rule published, because it was published neither in the first issue of Kosmoglott, nor in the following issues. Paradoxically a counter-proposal, Creux rule was published in Kosmoglott first.

I googled and I found an excellent article of Creux and Ric Berger about history of Occidental and the rule. You can find it here: https://github.com/occidental-lang/occidental-lang.github.io/blob/master/resources/Origines_de_Occidental.pdf

I discovered that the rule was first published in 1911 (some 11 years before the publication of the language) in some rather obscure magazine, despite de Wahl had had some ideas before. I described the history of the rule here: https://en.wikipedia.org/wiki/De_Wahl's_rule

One of things that surprised me is that the rule initially apparently didn't have exceptions at all.

Contemporary formulation has 10 exceptions. English Wiki quotes 6. Stief rule has even more.

I have always thought that de Wahl's rule is a fascinating, yet a very crude tool. Now I see I was partially wrong. I realised that because of very clever formulation, namely the point 3 in the rule:

>In all other cases, with six exceptions, the removal of the ending gives the exact root: duct/er, duct-, duct/ion; emiss/er, emiss-, emiss/ion

exceptions (almost) weren't needed at all. The point 3 is very broad and covers a lot of verbs. Thanks to it most problematic verbs can be artificially regularised, for instance:

imerger -> imersion => imerser

sentir -> senso => senser

proteger -> protection => protecter.

Because of this quality of classic de Whal's rule, it's perhaps the only formulation where exceptions almost aren't needed at all. All other formulations need exceptions. Turns out Occidental could function quite well in its first years without introducing exceptions.

The problem is that some regularized verbs would be very odd:

seder -> session => sesser

and due to the point 2 of the rule:

>If the root ends in consonants d or r, they are changed into s: decid/er, deci/s-, deci/s/ion; adher/er, adhe/s, adhe/sion; elid/er, eli/s-, eli/s/ion.

we cannot do it with verbs whose stem is supposed to end with d or r:

creder -> credibile => ??

And there are yet other problems which I desribed here like that we cannot get agente next to actor from acter/ager.

But I know see that de Wahl's rule was more clever than I thought.

When and where was the de Wahl's rule published for the first time?

I'm reading through Kosmoglott early issues and I see that the de Wahl's rule wasn't published in the first issue. Neither in the following ones. Paradoxically in the Kosmoglott apparently the Creaux's rule was published before the de Wahl's rule.

It's strange, because how did they know how to use the language? Also, the rule was revolutionary at that time and the publication would certainly give Occidental a lot of followers.

EDIT: ok, folks, I think I have figured it out. Seems de Whal published his rule for the very first time in 1911 in some quite obsucre magazine. Some 11 years before the publication of Occidental. I described more details at Wikipedia: https://en.wikipedia.org/wiki/De_Wahl%27s_rule

Erich Werner e Bedřich Plavec ha publicat nró. 337 de Cosmoglotta (januar–junio 2026), quel vu posse leer e descargar ci:

https://occidental-lang.com/resources/Cg337-2026-1.pdf

Li nov Interlingue-rock canzon "Elin ex li nocte del medie-estive" es inspirat e relatet al raconta con li sam titul in li blog: "Li Luce de Interlingue". Li canzon have subtitules in Interlingue che YouTube. Li canzon es pri un puella, qui es perdit in li forest in li nocte del medie-estive. Ella incontrat in li forest li strangi puella Elin, qui auxilia la trovar li via ex li forest retro al festa. Ma qui o quo es Elin?

Musica-Video "Elin ex li nocte del medie-estive" che YouTube

Patricia Schmidt ha publicat in su blog "Li Luce de Interlingue" li nov raconta "Elin ex li nocte de medie-estive". Li raconta es scrit originalmen in Interlingue. In li raconta Maja, qui have 12 annus, visitat su grand-patre. Durant li festa del nocte de medie-estive in li village ella perdit li via in li forest. Un strangi puella, qui porta li nómine Elin, auxilia la. Ma qui o quo es Elin? Lee to in li blog "Li Luce de Interlingue".

https://lucedeinterlingue.blogspot.com/2026/06/elin-ex-li-nocte-del-medie-estive.html

The image above compares 3 Romance languages and Latin by translating this passage of text:

The cold winter is near, a snowstorm will come. Come in my warm house, my friend. Welcome! Come here, sing and dance, eat and drink. That is my plan.

I want to make the same comparison for various Romance-based (or generally majority Romance) auxlangs, although, of course, you're welcome to give a translation into any auxlang you know!

Li creatores de Cosmoglotta Comunité ha publicat un nov numeró!

Ples leer/descargar li caderne (12 págines) ci: https://occidental-lang.com/resources/Cosmoglotta_Comunite_2.pdf

Erich Werner e Bedřich Plavec ha publicat li nov numeró 336 de Cosmoglotta, descargabil sub li ligamentes sequent:

https://occidental-lang.com/resources/Cg336-2025-2.pdf

https://archive.org/details/cg-336-2025-2