How are the words for the seed chosen?

For e.g.

togoles doesn't exist its togolês and even that its a very odd word

again oigale its oigalê and still nobody uses this

Probably its supposed to avoid easier bruteforcing of a seed?

I'm asking because Portuguese words for the seed are very unusual and some are even wrong...

I would be glad to contribute for a seed Portuguese dictionary if there's a way to do so.

Thanks !