Hi, for a while I’ve been using LanguageTool and Deepl Write to fix my spelling and grammar, mostly when writing in English.
However, I’ve wanted to use some Foss tool for that, extra points if it also works in spanish (Deepl write only works for english and German ATM).
Extra points if it works offline.
And language tool is a great option! I use it for many different languages and support for it can be found in many places. Even Thunderbird has first class support for it, these days!