Podcasting lends itself nicely to learning a language (whether one wants to know more about his own language, or picking up/improving her knowledge of a secondary, foreign language). When posting a language-related podcast, please indicate in your description what languages are being used:

One stop shop for many languages:

The BBC offers free online courses, and lots of handy tools, like online dictionaries and learning games in Chinese, French, German, Greek, Italian, Portuguese and Spanish. Written instructions are in English, but the lessons default to pictures and audio cues, much like the "Rosetta Stone" series. http://www.bbc.co.uk/languages/index.shtml

Chinese

• http://www.melnyks.com Podcast and resources that provide a free and simplified way to learn Mandarin Chinese and hear it spoken aloud.

• http://www.chinesepod.com/ Chinese Pod offers both a free and premium service.

English & ESL (English as a Second Language):

• http://www.mars-l.de/ Improve my English Podcasts by a native German speaker who asks listeners to correct his English (Blog and casts in English)

French:

• http://siliconvalleyfrogs.com/wordpress/ A french blogger and podcaster who covers everyday life in Silicon Valley (Blog and casts in French.)

• http://francepodcast.viabloga.com/ A French podcast directory which is in French. Here you can listen to Le Pod Mag of the French Podcast automatically on Itunes 4.9. There is also information where one can subscribe to Netizen which is a magazine on the world of blogging and podcasts, of course all in French.

Italian:

• http://www.learnitalianpod.com/ This podcast is a series of short Italian dialogues with a review of the vocabulary and the conjugation of the verb used. There is a beginner series and an Intermediate series, both found at this site (Casts in Italian and English)

Japanese:

• Japanese Pod 101 This podcast is a series of Japanese language lessons for beginners and intermediate speakers that incorporates cultural tidbits as well as pronunciation help from native Japanese speakers.

• Japanese Classical Literature at Bedtime Mostly for advanced and/or native speakers of Japanese, this podcast series is an audio version of classical Japanese literature such as the Tale of Genji.

Spanish

• http://ttlspodcast.blogspot.com/ Trying to learn Spanish "A podcast for adult learners of Spanish. Reviews and commentaries on available resources, including CDs, tapes, books, Internet radio, immersion language schools, and more." Also has complementary website.

• http://www.rollingrs.com This podcast consists of many episodes about learning the Spanish language. The lessons are organized by different areas of everyday life using the Spanish language, such as how to pronounce the alphabet, the days of the week, how to ask where you are from and learning colors. This podcast also a video podcast.

• http://podcasts.yahoo.com/series?s=414c1868cbffb7dfa7f79f850fc76499 This podcast is called Insta Spanish. The listener can find lessons on Spanish comprehension, learning Spanish music, grammar rules and Spanish slang. They also give vocabulary words and frequently used terms to assist in learning the Spanish language.