Welcome to the community.
Community members can provide translations here: https://translate.wemod.com/. Thanks for the offer to help out with them. Note this is entirely voluntary.
If by “mod team” you mean the community staff helping to support users, those are hand-picked by the Community Manager (@Chris) here at WeMod depending on several proven factors within both the forum and Discord communities. Such as their helpfulness to the community, their attitude towards others, their loyalty and experience.
If by “mod team” you meant to become a trainer developer, you’d need to understand C++ and Assembly, as WeMod’s trainers are rather advanced. If you possess those skills, do feel free to submit your CV / résumé to WeMod’s support address (as a first test of your knowledge of WeMod, I’ll let you find the address yourself ).