While filling a small history of each make + links to related makes, I realize that the British automotive industry is a so worse mess than what I thought So many companies buying each other in the 20th century, that's unbelievable.
I already updated many of the BMC/Leyland, I have the Chrysler / Rootes to do after.

For the make "PGO".
https://www.imcdb.org/vehicles_make-PGO.html

All the vehicles have been put under the Taiwanese make, there are vehicles from the French make.
The vehicles of the French make are those there:
https://www.imcdb.org/vehicles_make-PGO_model-356+Speedster.html
https://www.imcdb.org/vehicles_make-PGO_model-C%C3%A9vennes.html
https://www.imcdb.org/vehicles_make-PGO_model-C%C3%A9vennes+C.html
https://www.imcdb.org/vehicles_make-PGO_model-Speedster+II.html
https://www.imcdb.org/vehicle_141360-PGO.html

Wikipédia:
https://en.wikipedia.org/wiki/PGO_(automobile)
https://fr.wikipedia.org/wiki/PGO_(entreprise)

Here is the new page for the cars:
https://www.imcdb.org/vehicles.php?make=PGO-Automobiles

Thank you.

Logo and Infos for Caselani.
https://www.imcdb.org/vehicles_make-Caselani.html

https://fr.wikipedia.org/wiki/Caselani
https://www.facebook.com/caselani.official/

Updated. There are thousands of makes, I update these one by one from time to time when I land on them while renaming vehicles

https://www.imcdb.org/vehicles_make-Premier.html
https://fr.wikipedia.org/wiki/Premier_(automobile)

https://www.imcdb.org/vehicles_make-Perodua.html
https://fr.wikipedia.org/wiki/Perodua

https://www.imcdb.org/vehicles_make-Vehixel.html
https://www.transbus.org/construc/vehixel.html
https://fr.wikipedia.org/wiki/Trouillet_Mobilit%C3%A9_S%C3%A9curit%C3%A9
https://www.trouillet-mobilite.com/trouillet-mobilite-securite-constructeur

https://www.imcdb.org/vehicles_make-Gruau.html
https://fr.wikipedia.org/wiki/Gruau_(constructeur-carrossier)

https://www.imcdb.org/vehicles_make-Bollore.html
https://fr.wikipedia.org/wiki/Bollor%C3%A9

https://www.imcdb.org/vehicles_make-Unic.html
https://fr.wikipedia.org/wiki/Unic_(entreprise)

https://www.imcdb.org/vehicles_make-Irisbus.html
https://fr.wikipedia.org/wiki/Iveco_Bus

https://www.imcdb.org/vehicles_make-Rapido.html
https://www.rapido-camping-car.fr/
https://fr.wikipedia.org/wiki/Rapido_(entreprise)

https://www.imcdb.org/vehicles_make-Sovam.html
https://sovam.fr/
https://fr.wikipedia.org/wiki/Sovam

Cf my comment above: there are thousands of makes, for many of them it is easy to find the info, it is just a matter of time to update the page.
For ex-USSR makes it is often more difficult to find info though.