According to usage in France, the particles of proper nouns in “Le, La, Les, L'” are always uppercase, while “de” remains in lower case. (from La Porte, from L'Estoile...). Right now everything is lowercase.
Also, it seems to be missing the particle “La” and “Les” (“of La” exists) in the particle dropdown menu, while “Le” and “L'” are present; I don't know if these cases are common.
·