[Feature Request] Provide ability for Yoast to scan find compare similar focus keywords or focus keywords with grammar and treat them the same

[benvaassen]

• [x] I've read and understood the contribution guidelines.
• [x] I've searched for any related issues and avoided creating a duplicate issue.

Please give us a description of what happened.

If my Focus keyword is "book" and I make reference of "book's" or literature Yoast is not able to find that focus keyword or similar ones. The focus keyword field is not intuitive to know these are the same or similar enough.

Please describe what you expected to happen and why.

To find similar words and treat them as the same.

USE CASE Google is able to tell the differences, so should Yoast.

[benvaassen]

Please inform the customer of conversation # 223442 when this conversation has been closed.

[jdevalk]

I think we should be able to find the possessive... @manuelaugustin @IreneStr is that a nice challenge? :)

[IreneStr]

@jdevalk We think this should be doable.

[amboutwe]

Please inform the customer of conversation # 428221 when this conversation has been closed.

[amboutwe]

Please inform the customer of conversation # 514476 when this conversation has been closed.