chore: updates translation files and better transifex mapping

Description

improves translation for nl, ja, de, ko, it, pl, tr, es_419, hi and zh_CN languages

*Testing instructions:*

  • Create a new course and add a new DnDv2 problem

  • Edit the DnDv2 problem to use the Assessment mode

  • Change the user's language going to /update_lang/ (lms), choose one supported by this xblock (check "LANGUAGES" inside this repository settings file)

  • Go back to the problem and confirm the problem is being translated correctly (`nl` and `ja` were not supported before, so they should be available now for example)

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Assignee

Shafqat Farhan

Reporter

Open Source Pull Request Bot

Labels

Contributor Name

Raul Gallegos

Repo

edx-solutions/xblock-drag-and-drop-v2

Customer

Github Lines Added

4399

Github Lines Deleted

3706