Please share what you have used or even know about, even if you haven't used it. If you've used it and want to leave a review, please do that, too.
As people post, I will edit this one with a summary organized by language.
Some of these programs may have personal user reviews further down the thread. Feel free to post questions. Even if you see a program already listed, feel free to add your own personal review in the thread.
A listing here is not a recommendation by GCM, simply a starting point for you own research.
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French:
Monarch/Switched on Schoolhouse. This is focused on the culture and geography of France and is a little light on language. $90.
https://www.aop.com/curriculum/shop-monarch/french-i
French Essentials for Homeschool. A downloadable interactive curriculum. Free sample. 10 day refund policy. Haven't used it but it looks pretty good.
https://www.science.edu/acellus/cour...llus-french-i/
Power Homeschool:
https://www.science.edu/acellus/cour...llus-french-i/ They also have a middle school version. Haven't used it but it looks good. Downside is I don't think it can be purchased separately, only as part of their packaged homeschool program.
Francais Interactif
https://www.laits.utexas.edu/fi/home This is FREE. It is part of the Center for Open Educational Resources and Language Learning at the Univ of Texas Austin.
Houghton Mifflin homeschool French curriculum,
Bien Dit.
https://www.hmhco.com/search/shop/ho...ategory=french
French in Action. Free interactive online curriculum.
https://www.learner.org/resources/series83.html#
Learn French with Alexa.
Free lessons on YouTube and also a
Purchased curriculum
Classic Academic Press
Breaking the Barrier
https://tobreak.com
Getting Started With French, by William Linney
Chinese:
Yoyo Chinese
https://www.yoyochinese.com/landing
Michel Thomas
https://www.michelthomas.com/
Spanish:
ˇAvancemos! Houghton Mifflin homeschool.
https://www.hmhco.com/search/shop/ho...tegory=spanish
Salsa video series on PBS. Immersion, all Spanish. Geared toward younger kids.
https://www.pbs.org/show/salsa/
BJU
Classic Academic Press
Breaking the Barrier
https://tobreak.com
Getting Started With Spanish, by William Linney
Japanese:
Japanese From Zero.
http://www.yesjapan.com/
Irasshai. Free language learning video on PBS.
https://www.pbs.org/show/irasshai/
Dutch:
Get Lost, 15 modules for beginners. jekanmewat.nl
Korean:
Korean From Zero.
http://www.koreanfromzero.com/
German:
Deutsche im Blik. Free interactive program.
http://coerll.utexas.edu/coerll/proj...utsch-im-blick
American Sign Language (ASL):
Signing Time DVDs available from retailers, also some are on Amazon Prime and PBS. Aimed at younger children.
Signing Online
https://signingonline.com/
Life Print
http://www.lifeprint.com/
Latin:
Getting Started With Latin, by William Linney
Greek:
Classical Academic Press has Latin and Koine Greek For Children
Resources for several languages:
Center for Openness in Education and Language Learning. I am just starting to explore this site but, at first glance, it has some amazing resources that are all FREE.
Duolingo. Free app and website.
Memrise
Rosetta Stone
Pimsleur
Mango
Homeschool Buyers Co-Op
BJU
Abeka
Well Trained Mind Academy
Fluent Forever
https://fluent-forever.com/
Book Box
https://www.bookbox.com/
Muzzy (for younger kids)
Tuttle Publishing, mainly Asian languages
https://www.tuttlepublishing.com/brands/Language.html
Michel Thomas
https://www.michelthomas.com/