impr(language): move british spellings to british english mode (@AnnaBuchholz)

[AnnaBuchholz]

Description

I removed two words with British spelling from english_commonly_misspelled (how ironic) as well as some British spelling in English_450k.

Checks

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Closes #

[Miodec]

If you remove british spellings fron the word lists, please make sure to add them to the british english file to make sure they are correctly replaced.

[AnnaBuchholz]

Alright, I believe I got them all into the British English file. Is there anything else I need to do?

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