Thanks, that's a very interesting point! I'll have to look into this a bit further further. I've frequently read Zamenhof's famous congress speech that include

Thanks, that's a very interesting point! I'll have to look into this a bit further further. I've frequently read Zamenhof's famous congress speech that includes the part about "Ofte kunvenas personoj de malsamaj nacioj kaj komprenas unu la alian; sed kia grandega diferenco estas inter ilia reciproka kompreniĝado kaj la nia!" and the idea that human relations will be more equitable with an international auxiliary language... except now I don't know whether he in fact considered it "auxiliary" or merely "international". Now I'm thinking about the other interpretation in which he perhaps doesn't want other languages to survive in the long run. Notably I guess he called Esperanto only "la internacia lingvo" at first until other people started to call it "Esperanto", and perhaps the concept of "helplingvo" largely postdates him, although apparently "auxiliary language" was used toward the end of Zamenhof's own lifetime (Wikipedia suggests maybe first by Otto Jespersen), and these terms seem to suggest supplementing other languages rather than replacing them.