How to create my own dictionary tied to a user?

I´m working with documents in Norwegian. Since it´s not a widely used language, the spell-check vocabulary is not large, resulting in a lot of Norwegian words (especially the specialized fx in mechanical devices) to be underlined in red.

I would like to create my own custom dictionary, and add the rare Norwegian words into it, so the same words don´t appear on every spellcheck.
But: if I create a custom dictionary now, it will ony exist on this computer. I want to tie the dictionary to my username, so I can use it & improve it accross my devices. This means I probably need to log in to Libre office when working with the Writer. How do I do this?

Writing Aids

Imho there is no option like this.
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You could sync the dictionary-file yourself with external software from Dropbox to special clients…
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Or try to switch to an online-version like collabora and also jave your data in the cloud