false positive spell check

[hansvancalster]

See https://github.com/inbo/flea-extent/tree/hs-methoden

spell check marks "Boswijzer" and "entiteitsoverschrijdende" as spelling errors, however, they are in the nl-BE custom dictionary. It is not clear why they are not ignored.

[ElsLommelen]

If additional examples are needed: I have a similar case where words "EVINBO-tijd", "INBO-tijd" and "hij/zij" are not ignored in the nl-BE dictionary, while similar words like "EVINBO-middelen", "INBO-projecten" and "hem/haar" are ignored as expected. It looks words that contain certain specific letter combinations like "-tij" and "/zij" are not ignored.