"title": "Geographical scope",
"description": "The size of the area the project covers",
"label": "No legal entity",
"label": "Non-profit organisation or charity",
"label": "Private enterprise (corporation, sole trader/proprietor, or partnership)",
"context": "need to define and create a permanent URL"
This field contains some copy paste errors (I presume) because the Title and Description and Enum options are the same as Geo scope... That aside - this field is a HUGE can of worms, because Legal Forms vary by country, so you can't have a simple enum list, unless you have asked for Country code first ... but even then it's not easy to know where to pull the latest list of possible Legal forms for that country from...
We do need to nail this, because many schemas want to use this field.
One option is to follow https://schema.org/leiCode which says:
An organization identifier that uniquely identifies a legal entity as defined in ISO 17442.
The implementation and use of Legal Entity Identifier (LEI) is supported by Global Legal Entity Identifier Foundation https://www.gleif.org.
But GLEIF doesn't looks like much help as Orgs need to follow a certification process to get an LEI - see https://www.gleif.org/en/lei-data/lei-mapping - and its doubtful that many CC projects will have done / want to do this...
https://spec.edmcouncil.org/fibo/schema might be useful when we get into trying to define transactions
But doesn't seem to help define Legal Form per se
There's also this https://standards.esd.org.uk/?uri=list%2ForganisationTypes which is more about Org Type than Legal Entity - however, what are you really getting at with this field? If what you want to know is if the Org is a co-op and / or non profit or a for profit Business, then maybe Org Type is more appropriate here, and simpler to deliver?
I would suggest redesigning this field according to https://standards.esd.org.uk/?uri=list%2ForganisationTypes which could help avoid the 'different legal forms per country' problem, be more accurate than your current list, be easy enough for CC Orgs / projects to fill in - and still provide the filtering I think you want.
NB a "co-op" is not a Legal Form in the UK - and nor is a "Non-profit organisation or charity" - Several Legal Forms can be used for Co-ops, and can also be both Non-profit / for profit and / or charities.