another simple recipe for a bernd language is to use different layout for english keyboard when typing, for example actually typing in Colemak but having Qwerty layout set in OS/editor (for berndish transliteration). Learning colemak also benefits typing (and is fun), so in a way its useful (not sure if reading/writing qwerty -> colemak translit is useful too)

basically its normal english with different alphabet that can be typed quite fast on any computer (even without colemak layout) after few weeks of leaning, reading it is probably a lot more complicated however
you also can buy a colemak keyboard or glue some letters on your old one if you need it

for example:
qwerty: "they can't quite get this message"
colemak: "fhko caj'f qilfk tkf fhld mkddatk"

and there are already tools and online converter/decoder:
https://colemak.com/Converter