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You should talk to Qiii2006, who will help you to get started. Qiii2006 has worked alone for a long time, and his time is limited, so he would probably welcome some help, but please respect his wishes about priorities.
Meanwhile, you need to request a Translator Account, then read the Contributors' Help files.
Oh, I already made an request before seeing your post and am expecting the outcome.
You'r right, and I'll talk to Qiii2006 later.