The Tl is completed not missing anything relevant right?
Correct. If you're incredibly thorough in exploring and looking at everything, it's possible you'd come across like a couple of one-off untranslated lines throughout the game, but it's super niche scenarios (and even those are being worked on, so might be fixed by the time you get to playing, depending). In general, everything is translated, including the main story, H-scenes, all item and enemy descriptions / fluff, and post-game.
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Speaking of post-game: are there any lore-heads in the thread that have made it through it and have thoughts? I think this is my first time actually powering through the post-game for one of these games, so I don't really have a sense of whether they tend to be connected to past and / or upcoming games at all, or not. The story bread-crumbs it dropped were interesting enough on their own, but it's been long enough since I played the earlier games in the series that I really don't have a sense for whether or not there were any blatant connections (or room for crackpot theories, for that matter). (Case in point: I had to look up the final boss to see whether they had been in, or been referenced in, any of the earlier games).