How do I send HT coins to a language partner?

You send HT coins to others through Goodie Bags. To send a Goodie Bag, enter a Voiceroom or HT Live, and click on "Gifts" > "Goodie Bag" > "HT Coins". After sending a Goodie Bag, language partners in the Live or Voiceroom will get the chance to get HT Coins in the Goodie Bag.