@thyarles you've been active here, and that is already appreciated.
The phrasing "significant and enduring contributions" is deliberately vague about the types of contributions, though the Membership Committee has agreed generally on what it looks for, which includes (but is not limited to!): attendance at Plone events (symposia, sprints, conferences), giving talks or training classes, writing code or documentation, translations, testing, participation in the forum and chat. You can read more about the Membership Committee's process https://plone.org/community/membership and Foundation membership applications at https://plone.org/foundation/members
We know that there have been hurdles communicating with and encouraging participation or engagement from a worldwide community like ours, in which language has been a barrier. We have Board ambassadors who represent some of these regions and languages, and we hope they are able to encourage more engagement from their local peers https://plone.org/foundation/board/ambassadors