(AU)Language Talkback - Discussion forum and archive to support language in Australia.
About.com: French for Beginners Forum - View postings or post a message of your own for this French discussion forum. Covers pen pals, grammar, vocabulary, and online practice.
Ask a Linguist - Online forum where anyone interested in language or linguistics can ask a question and get the response from a panel of professional linguists.
Chinese Chat - Learn Mandarin Chinese by chatting in romanized Chinese (pinyin) using an integrated dictionary/chat room. No special software or plug-ins needed.
Rockle Lingomigo - Language learning through email and chat exchanges. Users with complementary language skills are matched to help them learn a new language more effectively.
Spanish Translators Forum - Public Spanish translation forum where all translators can interact and help each other with translations between English and Spanish.
Yahoo! Groups: LatinChat-L - Forum for beginners of Latin to better their Latin language skills by writing and chatting in Latin.