LanguageTool doesn’t seem to know the phrase “Hippokratischer Eid”. With a local installation of LanguageTool v6.3 as well as with the online mask at https://languagetool.org/ that phrase is complained with the error message
Außer am Satzanfang werden nur Nomen und Eigennamen großgeschrieben.
Please consider adding the phrase to the LanguageTool corpus.
To reproduce:
$ curl -d "language=de-DE" -d "text=Der Hippokratische Eid gilt." http://localhost:8081/v2/check | jq
[...]
"matches": [
{
"message": "Außer am Satzanfang werden nur Nomen und Eigennamen großgeschrieben.",
"shortMessage": "",
"replacements": [
{
"value": "hippokratische"
}
],
"offset": 4,
"length": 14,
[...]