practicealanguage.xyz

https://practicealanguage.xyz/ "Practice a language by having conversations about the topic of your choice." The reason I am pointing out this website even though it doesn't (yet) support Walloon is because it's open source. And thus, becomes a good example of free alternative to other language learning tools. It uses GPT-3.5 to have conversations and Whisper-1 (ASR). Those underlying components are where Walloon support is lacking. Whisper is a general-purpose speech recognition model. https://github.com/openai/whisper