I would like to add I am interested in learning other languages as a native English speaker but I do have to say the intensive doesn't seem to really be there mostly because it's so easy to default back to English where with basically everyone
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There are pockets of the Internet segmented by language. Mastodon is a good example of that. Buy a dictionary, join the target language instance. Within a few weeks, you will make a lot of progress, and maybe make a friend a two.