Sometimes it's beyond me how tech savy people are struggling with the easiest things online.

The page itself has only very few links. Randomly clicking through it logged in would have a high chance hitting one of the links that would either lead you directly to one of the links where you can CONTRIBUTE: https://voice.mozilla.org/de/speak, your dashboard where you can also find links to the CONTRIBUTE part or just the huge microphone symbol.

I'm talking about new languages, which haven't been launched yet, because they don't have enough text to record yet.

The actual method to contribute to them is finding Mozilla's internal translation tool, proposing translations, then finding a Mozillian to approve them. Then there's an obscure webapp for sentence submission and voting, but it doesn't give any feedback whether sentences you've submitted were accepted or went to /dev/null.

(you see people struggling with easiest things, because you assume people struggle with easiest things, rather than that you've misunderstood the problem.)

There is feedback in sentence collector. If your sentence too long it will tell you straight away. If your sentence is rejected by people it will appear in "rejected sentences" tab. If your sentences are approved you can see it in GitHub repo.

What GitHub? Please realize that none of this is obvious to an outsider who doesn't know how your pipeline is built. None of this is explained on the Voice website. These tools aren't even linked to on the official website.

I've submitted 200 sentences, and none of the progress counters shown to me increased by 200, so I assumed they were lost, and gave up.

In mozilla/voice-web/server/data/ but if at your profile tab in sentence-collector there are 0 sentences added than that means that your sentences hadn't been added even to sentence-collector for approval.

The people that run the voice program at Mozilla seem to be very disconnected from the rest of Mozilla. They are essentially an "innovation team" that jump from project to project across the company acting as almost an agency inside Mozilla. Seems this model has really made projects like this suffer because there isn't a team always there to iterate on the project and make it better.

"The Easiest Things" is the refrain of poor UX advocates.

I think the actual work like that happens on GitHub. I found it too annoying to get the thing up and running to contribute at all, so I gave up.

They just not very clear. If you language "in progress" then you need collect 5k sentences. They have special web app called "sentence collector". In which you can approve sentences or add new ones. Each sentence should be approved by 3 people. After sentences are approved they get released to GitHub. After 5k sentences are approved you will be able to record audio and listen to recordings as in any other "big" language. As practice shows you need very small amount of people to do it. 4-5 is enough.