I’m having trouble imagining a situation where it would be both desirable and functional to display 6 or more names for every taxon simultaneously.
This isn’t denying the reality of people who live in multi-lingual contexts or who are learning multiple languages and would find it useful to be able to easily access taxon names in more than 3 languages.
But it seems to me that “be able to quickly and easily access” isn’t necessarily the same is “display all these languages at the same time” – perhaps what is needed is a way to switch between display lexica at any time (the way one can switch between default locations on the taxon pages and in explore) rather than having to change this in one’s profile settings.
Maybe this is different for people who use multiple languages on a regular basis, but I find personally that 3 languages is about the maximum I can usefully process at any given moment while still maintaining some hope of keeping them sorted in my head. These needn’t always be the same three languages; the limiting factor is how many I have to juggle at the same time – i.e., how many are active.
And there is also the question of how much space on the page it would require to include 6 or more names for every taxon/observation – in particular in those areas of the website where iNat relies on thumbnails to present content. The screen would quickly become quite visually cluttered. And even if each of those six languages included a language code after them, I think it could quickly become confusing to try to mentally connect the name and the taxon it refers to in the correct language, particularly if some of the languages one has selected are closely related.