Hi Dax!
Have you gotten started yet?
If you'd like to translate the i-MSCP core you could start out making an account on transifex.com, then navigate to https://www.transifex.com/sign…jects/p/i-MSCP/translate/
Join the language "teams" of the languages you'd like to translate.
If you'd like to translate plugins, that's a little different.
Start out making a Github account (if you haven't gotten that already) and go to the imscp/plugins repo.
You could search for files with name en_GB or nl_NL for translatable files.
Submit a PR when you're done and one of the maintainers will get to checking your contribution and if it's good merge your PR and commit it to the plugin branch.