Questions about Logitech K800

Good day I ordered this keyboard in 2021 in the Swiss version, but now it is only available in the German version, what alternative is there in the same style? Or how can I use the following symbols (',è,é,à, ä,ö,ü)? Have tried all possible key combinations, unfortunately all failed. Thanks

very very sad I have this keyboard x3 times wanted to buy x4 of them unfortunately the jezd Ale have fixed batteries no more AAA zelen ser ser sad battery exchange no longer mach bar(!!!)

I can only purchase cables for charging K8oo with mx master mouse

Does this work also with USB Cable only? I don't want to use wireless. I see that there is USB cable for charging, but if I use it for connection, does it work without battery and wireless connection?

Up to what distance from the computer can I use the keyboard?

I bought this German keyboard, can anyone tell me how to change the Aet spider monkey symbol? The Aet klammeraffe symbol is on the Q key.