I would like to write in a different language and use spell check, but always using the same keyboard layout

I am writing mostly in English and I use the default "ABC" layout on macbook with macOS Monterey.

Sometimes I get an email in different languages.

I reply them in the same language. I don't want to change keyboard layout, because I wouldn't know where the letters are.

However, apple mail now keeps typo-correcting them into English words.

The only way to make spellcheck work correctly, is to change the keyboard layout, resulting in constant mistyping as letters are moved around.

Does anyone have a suggestion, how to keep an email's language in say German, while typing on the English-ABC keyboard?

Thank you and Happy Holidays!

(Some languages may have the ABC layout, but not the ones I use.)

Spellcheck in MacOS for Apple apps is governed independently from the keyboard via System Preferences > Keyboard > Text > Spelling and (in an app) via Edit > Spelling and Grammar > Show Spelling and Grammar. See this note.

So you should be able to use ABC with any language that it is able to type and still have the right spellcheck by adjusting those settings.