Mobile Keyboard?

How can I install a different keyboard on my HUAWEI Mate 20 Lite? On the phone is given standard Swiftkey keyboard. Just stupid that the ö and ü ect. Not good to write. Is there a conversion option here? If yes how?

Press a long time on a or O. Evtl then come the umlauts or a minimenue, where you can select numbers or umlauts.

Otherwise, download from Google PlayStore Gboard. I can only recommend.

Many Thanks