For example, there are many Chinese words that mean very specific emotions that the English language does not have a single word on its own to match. Is this because the Chinese language has existed for so much longer than the modern English language and has had time to develop these words?
My apologies if this is the incorrect subreddit to ask this, please kindly redirect me to the appropriate one.
Check out r/linguistics. Great subreddit.
In addition to /r/Linguistics (as already mentioned), there's also /r/AskLinguistics, and there are linguists over in /r/AskSocialScience.