The notifications should ignore translation pages, it seems. Unless there is a hook for this, it has to be fixed outside Translate.

Hmm. I guess Translate should add FuzzyBot to $wgEchoAgentBlacklist?

I don't know what all it controls. In general people wan't to know if their translation is updated by FuzzyBot (this happens frequently in translatewiki.net when importing external changes).

Best would be to collapse notifications for translatable page and all its translation pages [1]. Ignoring translation pages completely is not necessarily the best thing, given they might have links to translated versions of a page.

[1] https://www.mediawiki.org/wiki/Help:Extension:Translate/Glossary

Perhaps Echo should ignore (or provide a digest for) multiple notifications in a short timespan which are about the same page. There are many possible cases when a link is propagated to multiple pages, e.g. when a page gets "featured" somewhere.

No, I don’t think this is a bug. The software works as designed, notifying about all newly added links. People are annoyed by this, but that doesn’t mean we should call it a bug. It’s more like a feature request, if you really want to label it, although it’s not a crystal clear feature request either.

In T153558#3140222, @Nemo_bis wrote:

Perhaps Echo should ignore (or provide a digest for) multiple notifications in a short timespan which are about the same page.

Nowadays, links made to the same page are bundled in the drawer regardless of the timespan they were generated in, but no such bundling happens when one visits Special:Notifications. (I don’t remember how it worked in 2017.)

There are many possible cases when a link is propagated to multiple pages, e.g. when a page gets "featured" somewhere.

Featuring is different from the Translate case in that featuring usually means a single edit making the link appear at multiple places (which may already be handled by Echo?), while the Translate case means multiple edits making the link appear at multiple places. The only connection between these edits is that AFAIK they all happen in the same job (i.e. in the same PHP process).