For a while, I'd been using the US international layout, but then I had to switch to the German standard layout and am now accustomed to it, and that makes totally sense as thats the language I use the most on the web atm. Sticking to a German layout is also a UX-compatibility for me as I sometimes have to work at PCs with only German layout installed.
Now I increasingly need to be able to conveniently type Spanish and Polish, and am looking for an alternative German layout that would enable this much like the US international layout. The standard German layout already has some French characters, but, sadly, not the Spanish or Polish ones (different sorts of accents + ł, ą, ę in Polish). As I also have to type Cyrillic, I already have two different layouts installed and going for two more would make daily layout switching a mess.
I've heard about Neo, but I'm not sure that learning an entirely different layout is a sane option in my case. Besides, its implementation of "layers" is very similar to switching between multiple different keyboard layouts. Is there an German-based international layout I could use or any other tweak I could use to enable typing of these characters on a German keyboard?