Vale spelling ignoring custom dict

[konradkolo]

Hey there!

I'm using a British English Hunspell dictionary as the basis for my Vale spelling rule.

For some reason, the rule does not pick up the (somewhat) incorrect spelling of "organization" in the following HTML fragment:

<p>In this version, you will notice American spellings of common words such as "color", "favorite", "center", and "organization". It is important to familiarize yourself with these variations, especially if you plan to travel or work in the United States. Additionally, words like "theater", "traveling", and "defense" use different spelling compared to British English.</p>

All other instances of non-BrE spelling are picked up correctly. And while there's an argument to be made that "organization" is an accepted spelling variant in some BrE dictionaries, the Hunspell dictionary seems to have it explicitly set to only allow "organisation" (I checked for the presence of "organization" in the .dic but found none):
https://github.com/wooorm/dictionaries/blob/main/dictionaries/en-GB/index.dic#L34557

My spelling rule:

extends: spelling
message: "Check the spelling of '%s'"
level: warning
dicpath: config/dictionaries
dictionaries:
    - en_GB

Pointing to:

• .vale\styles\config\dictionaries\en_GB.aff
• .vale\styles\config\dictionaries\en_GB.dic

I have also disabled the default Vale spelling in my .ini via Vale.Spelling = NO.

There's a similar discussion in #837, but in this case I'm using a custom dictionary which should theoretically flag "organization". Am I missing something here?