OK, at this moment there are more than 100 articles in the blog section.
In config.toml I have e.g.
[Taxonomies]
[languages.de.taxonomies]
(...)
rechtliches = "rechtliches"
(...)
[languages.en.taxonomies]
(...)
rechtliches = "legal-matters"
(...)
and for example in the frontmatter there is something like this in somearticle.md
+++
date = "2020-06-30T12:20:58+02:00"
author = "Verfasser"
title = "Headline German"
rechtliches = ["Geld"]
+++
and in somearticle.en.md
+++
date = "2020-06-30T12:20:58+02:00"
author = "Verfasser"
title = "Headline English"
legal-matters = ["Money"]
+++
and for this I cannot see any mistake.
But what I did in the meantime was to delete the keywords
index in the related
section of config.toml as I do not use these in this internal site.
Some related articles show up in the meantime in the german site - not in the english part. But there are only a dozen articles til now - perhaps this will change some time.
Anyway: thanks for pointing me to the direction to play with those numbers (even though these exact numbers worked fine for both other sites similar in size and structure ) …