The Wikipedia article on Occidental/Interlingue says (in this version):

According to the Occidental magazine Cosmoglotta in 1928, a majority of Ido adherents took up Occidental in place of Ido.

Obviously, Cosmosglotta isn't an unbiased publication venue. Is there any independent evidence that this switching of language actually took place?

  • Ido as a reform of Esperanto (around 1907) did convince only a minority of the Esperanto speakers. It indeed might be that a second disillusion sent peoply to Occidental (or Interlingue), but there are still Idists. And for instance Interlingua. The term "majority" might relate to a quite relative Quantity here. However the name Interlingue or Occidental should have had some more allure to non-Esperantists, classical educated, Romance speakers.
    – Joop Eggen
    Dec 17, 2018 at 13:39

2 Answers 2


I'm as pro-Occidental as they come (it's the only auxiliary language that I support) but I came across that article in 1928 during my typing up the archives of Cosmoglotta and that article is nothing more than Ric Berger wishful thinking. He unfortunately spent just as much time attacking Ido as he did supporting Occidental, and kept on proclaiming it to be moribund and ready to collapse for some 20 years.

Here's the article in question that he wrote in 1928 on the Ido conference from which he concluded that Ido was on its last legs:

http://cosmoglotta.pbworks.com/w/page/132587775/Cosmoglotta%20A%20053%20%28oct%201928%29 (Title: Raport del Occidental-Observator Ric. Berger al Association «Cosmoglotta», Wien.)

So the answer is no. However, it's also true that the majority of the Occidentalists at that time were once Idists, from Berger to Gär to Ramstedt to Pigal to de Guesnet and all the rest. There was definitely a large influx from Ido to Occidental, and Occidental as far as I can tell was the most active auxiliary language after Esperanto by the late 30s and into the 1940s. Matejka and Berger had a lot of back-and-forth in the 1920s to early 1930s until Matejka decided to move over to Occidental, which he stayed with until his death in the late 1990s. He's probably the most prominent example of a major Idist who went full in on Occidental. But Berger hadn't taken into account the other source for new Idists, namely new users who weren't satisfied with Esperanto but still liked the overall concept (i.e. the people that thought that Zamenhof almost got it right).

Anyhow, I removed that sentence from Wikipedia last year when going through the Cosmoglotta archives because it certainly isn't backed up by anything besides Berger's wishes.


r/Ido has twenty times as many subscribers as r/Interlingue. While comparing reddit subscribers may not be the most scientific method, it's probably fair to assume this reflects their popularity in general. It's impossible to really know if most Ido-ists switched to Occidental back in the 1920s, but even if they did I think it's fair to say that later generations preferred Ido to Interlingue. Perhaps confusion with the more popular Interlingua is to blame.

  • As of 1928, Interlingua was not yet designed (not even projected) and Cosmoglotta was the magazin of the Interlingue community. A confusion is excluded here.
    – Sir Cornflakes
    Dec 31, 2018 at 22:00
  • 1
    @jknappen A confusion is excluded at the time of the article's publishing (at which point Interlingue was called Occidental anyway as far as I know), but I'm referring to the sizes of the modern reddit communities rather than to the languages' popularity in the 1920s.
    – Sparksbet
    Jan 7, 2019 at 10:34

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