Problem you have encountered:

As per public doc Some English words (nouns) ending with "s" would help to indicate that there is more than one. However in some scenarios, this doesn't seem to be working as expected.

This was encountered in https://stackoverflow.com/questions/68865393/google-natural-language-syntax-analysis

Example input:

The dolphins jump over the wall

API response snippet:

 {
      "text": {
        "content": "dolphins",
        "beginOffset": 4
      },
      "partOfSpeech": {
        "number": "SINGULAR",

What you expected to happen:

Some English words (nouns) ending with "s" should be identified as "PLURAL".

Steps to reproduce:

Use the following examples:

The dolphins jump over the wall.
The cows jump over the wall.
The crows jump over the wall.

Send POST request:

curl -X POST \
  -H "Authorization: Bearer "$(gcloud auth application-default print-access-token) \
  -H "Content-Type: application/json; charset=utf-8" \
 "https://language.googleapis.com/v1/documents:analyzeSyntax" \
  --data "{
  'document':{
    'type':'PLAIN_TEXT',
    'content':'The dolphins jump over the wall'
  },
  'encodingType':'UTF8'
}"

This will return a response containing field "number" and indicates if it is "SINGULAR", "PLURAL" or "DUAL".

Other information (workarounds you have tried, documentation consulted, etc):

Issue 199097296

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