Hi! I want to start off by saying that I really enjoyed the game, but I unfortunately ran into a lot of errors.
I found that the English version had a lot of issues with repeating dialogue, typos, and untranslated sections. I had trouble following some things due to that. It'd kind of go something like this;
Me: Hello, it's been a while!
Person: Hi, how are you?
Me: Hello, it's been a while!
Person: That's great to hear!
I think this caused me to miss some crucial dialogue in some places unfortunately. I think the game would benefit from another look-over by the translator(s) to see the inconsistencies and hopefully fix them.
There were also some issues with portraits not appearing, or glitches in which I'd done a puzzle correctly (like the tea) but got more than one outcome; such as that Althea liked her tea, but then in the next line she hated her tea, or that I would be presented two options but one wouldn't work and they'd lead to the same dialogue branch. For example, if option 1 was "Hello" and option 2 was "Goodbye", then no matter what I chose, I would end up saying "Hello" in some choices. I do not know if the Spanish version has these issues, because I cannot read Spanish.
Other than that, Dear Althea is wonderfully done! I've played many visual novels and went in with the usual expectations that I have, but I was very impressed by the story and just how much artwork there is! I can tell it truly took a lot of work. I hope the issues can be fixed at some point.