Yes i did.
I strongly doubt you are REALLY neutral as you posted that example.
So i've assumed you read this thread topic and you agree that idea is helpfull for this thread. In other way you risk you posting out of topic completely useless examples. The same usefull as only "bla bla bla".
And I have no idea what that last sentence is supposed to mean.
rz , sz, cz consists of four well known letters which are in english as well as in polish alphabet.
So substitution of them with Czech letters has nothing to do with polish diacritics problem.
Such substitution ( ř for rz ) is usefull if you are UNABLE identyfying rz particle, so in that case (after such substitution) you dont need to identyfying such particles as all will be substituted.
But if you creating your post or sms you HAVE to know proper forms (of each polish word you are going to use ) before substitution and substitute all instances manually in a typing process.
To do that you have to be able identyfying such particles personally without any other kind of help.
So such coding scheme is useless at that (quite high or at least moderate ) language level.
That scheme is only usefull when you are still very beginner. Which is unable to write such complicated messages personally, and still need help to indentyfying such simple particles as rz, cz, or sz.
How do you write ( in your sms or email ) Kostřeva if you know only Kostrzewa (from your source materials which are not substituted) and still you are unable to identyfying rz to pronounce them correct ????
If you are unable to answer that question think twice before you create next post out of topic.