Works well for me! Have been using Kagi for well over a year now. (I assume you’re talking about the German search results, not their German UI.)

German works great on Kagi, no problems at all.

I average 800-1000 searches per month and I don't generally search for places I know the URL for (usually only when I can't spell it)

Fastmail is like Gmail used to be: fast, good search, functional spam filter. I have my own domain so switching took a couple of minutes and over the next week I realized that I never once regretted it – I saw less spam and I was surprised by how much stuff like infrequent newsletters I’d missed because Gmail was filtering it incorrectly while letting through tons of marketing junk.

I think the comparison is that they just seem to give a shit about putting out a very good product. Filter and snooze automatically is probably my favorite unique capability but it’s less one thing than the overall ethos and execution.

Also, real support! Your email is important, you should be able to open a ticket and reach someone that knows what they’re doing.

Just like parent poster, there's a few things I pay for, and those are Kagi and Fastmail :)

Fastmail is... FAST. The page refresh is basically instant, and the UI is super-snappy, well refined and something like 2026, while Gmail hasn't changed in... 15 years? It supports a lot of features (identities, masked addresses, ...), not to mention that I can have my domains properly hosted on it, for 5eur/mo.

I use it for Finnish all the time and it is comparable to Google I would say.

I find it great for Japanese, provided you search in the Japanese language mode.