The LangX Hierarchy shown here is an illustrative formalisation of this process. Lang25 would be the initial “global pidgin” IAL, but would be entirely open-ended – exactly as the linguistic progress of a free individual or community is open-ended. Lang25 started in 2005 with a provisional global core vocabulary, which continues to be elaborated.

Very briefly, LangX should always be inclusive (within what is right and proper) - otherwise it could have no function as a universal language. Most of us use language to exclude as well as include, but let us employ our mother tongue - or another language - if we wish to exclude, and LangX so as to include all listeners. This means that everyone should respect, as a matter of good form and manners, the phonetic and structural limits of the Official IAL - Lang25 initially - when addressing a mass international audience or readership. Meanwhile the International Language Committee – which is being provisionally formed this year, subject to ratification, modification or replacement - should maintain orthographic and grammatical regularity through its publications, and arbitrate the rate of change and direction of development, always in view of the latest science and in close consultation with all interested parties. Lang25 would be the Official IAL until 2108 according to this illustrative timescale, but that wouldn't mean that the process should stop there: behind the scenes the cumulative stages of LangX should be provisionally and unofficially developed, and used or “beta tested” as much as possible - though only “rolled out” in stages (Lang29, Lang33 etc.) with the imprimatur “Official IAL” according to the level of general linguistic attainment in every country. Grammatical advance is not indicated on this chart, but would keep pace with the growing number of consonants and vowels in the phonology. The columns of percentages are an estimate of those using the successive LangX sociolects as mother tongues and auxiliary languages respectively, at the time they became the Official IAL. There is of course no reason to suppose that progress would conform to the illustrative mnemonic timescale shown here.