As I mentioned in that post, the FSI courses are public domain, having been developed by the US federal government for training diplomats. However, there are two other similar language learning sources: those from the Peace Corps and the Defense Language Institute.
I often find myself re-searching for quality resources for these courses, so wanted to share my findings for future reference. It’s important to note that these courses are a little outdated, so definitely need to be supplemented with more recent materials, too.
- The Live Lingua Project is a proprietary language learning school, but they host probably the most comprehensive database of materials for the FSI, DLI and Peace Corps language learning materials.
- The Yojik Website is maintained by Eric Streit and hosts various other resources in addition to those from the FSI, DLI and Peace Corps.
You can find plenty of alternatives, but these are two reliable sources.