feat: remove new set to allow duplicates

[sk8Guerra]

Hi! Is there any specific reason why new Set is being used to avoid duplicates and the verbs conjugations? In many languages some verbs might be the same when conjugated for different pronouns and also in tenses, they are all the same, such as in past participle, but they are still needed.

There is a need of having a full list of verbs even though they are repeated, to create tables just like in their web site. This is why I think removing the new Set is good, to have the full list, and then we can manually add the pronouns.