Fix #12960: Add Spanish and Portuguese translation tips to contributor dashboard (#12975)
Fix #12960: Add Spanish and Portuguese translation tips to contributor dashboard (#12975)

* Add Spanish and Portuguese tips.

* Fix compilation issues

* fix comment punctuation

* Filter by classroom topic

* Revert other branch changes

* Add Spanish example
brianrodri/oppia,kevinlee12/oppia,oppia/oppia,kevinlee12/oppia,oppia/oppia,brianrodri/oppia,kevinlee12/oppia,brianrodri/oppia,kevinlee12/oppia,kevinlee12/oppia,brianrodri/oppia,oppia/oppia,oppia/oppia,brianrodri/oppia,oppia/oppia