I think this goes for a lot more than just programming languages. FOSS projects in general tend to pick some generic English words as names that make them really hard to find. I've even seen a few startups that've fallen into this pit.
Ironically, the fact that most "decent" domain names have been taken is forcing startups to put more time into coming up with a name which could ultimately help their searchability, though it does come at the expense of the "speakability" of their name.
FOSS projects in general tend to pick some generic English words as names that make them really hard to find
This is related to most F/OSS projects having a crushing deficit in the marketing skills department. Notice how most don't have a visual identity, either? And how they typically launch mostly undocumented, on somebody else's website?
I had a checklist for launching A/Bingo, and held off on it for a week past when the code was ready, because the marketing wasn't. Logo, slogan, landing page, usage documentation, install documentation, live demo, domain name. It practically killed me because I was/am proud of that project and wanted to start collecting feedback but I know it won't spread if I don't do a proper job of it.
There is no point in spending dozens or hundreds of engineer hours on a project if it languishes in obscurity because you were too disinterested to, e.g., put a logo on it. (Mine cost $210. Cheap at the price!)
Incidentally, even if you can't get the exact match domain .com domain name for your project, for OSS everyone is just going to Google you anyhow. Name the project well and you will rank for your own name very, very fast as a consequence of your normal marketing activities, since good OSS tends to collect authoritative links with laser focused anchor text. </freeSEOAdvice>
Ironically, the fact that most "decent" domain names have been taken is forcing startups to put more time into coming up with a name which could ultimately help their searchability, though it does come at the expense of the "speakability" of their name.