This isn't really a question and thus can't be "answered" as such, so I thought I'd distill some useful advice from the comments instead.
Conlangs which arise from SFF-related works are on-topic on SFF.SE, while conlangs which arise from other settings, and the construction of new conlangs, are both off-topic here. This was true before Conlang.SE existed, and it is still true now. Adding a new Stack doesn't change anything. However, some questions may get better answers there than here, and vice-versa. For example:
- Some conlangs have fantastical (magical) properties, and those properties are likely to be off-topic on Conlang.SE because they simply don't exist in the real world. So you should ask about such things on SFF.SE instead.
- Some writers, like Tolkien, spend a lot of time thinking about the history of their conlangs. Determining the in-universe etymology of words is likely to be on-topic on both sites, I think (it seems like Conlang.SE is still determining its scope). However, SFF.SE is probably better positioned for questions relating to the in-universe culture and history, while Conlang.SE is probably more able to talk about linguistic processes. You may get materially different answers as a result.
- If you want to ask a deep technical question about the linguistics of a conlang, such as "Is Elvish nominative-accusative or ergative-absolutive?", that is probably on-topic on SFF.SE, but you are far more likely to get a useful answer from Conlang.SE or maybe even Linguistics.SE. On any site, you should show your attempt to solve a question like that and describe in detail the part that has you confused, because otherwise it's just trivia.