When adding words to a dictionary using the Spell Checking option, where are they stored?

Hi,

I'd like to know which file stores the words I added to the dictionary when spell checking my document.

I looked into the Linguistics > Providers > Proximity folder, but no *.lex files has been recently edited. I suspect words are added to a custom dictionary stored elsewhere, but I can't find it.

Subsidiary question: Is this possible to share the custom dictionary with my colleague, or to send it to her?

Thanks in advance