A Dictionary is basically a list of key and value pairs. You can use it to make a mapping of the characters to its replacement. If you know JSON, it is similar to Objects.
https://docs.kodular.io/blocks/dictionaries/
Here’s an example of using Dictionaries for character mapping which is exactly what you are looking for: Chars exchanges. Dictionary. Json to csv. Transliteration - Tutorials and Guides - MIT App Inventor Community
Show your blocks
this is my block according to your suggestion
And if you want to simplify:
First make this dictionary, then press Do it.
Copy the result
Use that this extension to convert the copied text to dictionary
Delete all dictionary blocks.
Do the same as my previous post to replace text
Well @WatermelonIce already gave you block.
But if you are using for then you have to use
For I in list : your list
Replace item I
With item in list2
index: of i in list 1
Thanks for helping me , but can you help me without using Dictionary blocks 
what you mean by For I in list
There is a block in list category
For item in list
Why?
This uses the dictionary blocks, but after all the dictionary blocks is not needed
See here
Thanks to all who tried to solve my problem.
And a big thanks to @ WatermelonIce
I watched some tutorials about Dictionary Blocks from Youtube and implement logic which is given by @ WatermelonIce. then i am getting output as i expected. so i want to say @ WatermelonIce and and Dictionary Blocks is very Amazing. 
Why don’t you search for that font and use it?!
I don’t understand 
if he is willing to change evey text with that desired font,
why not to import that font.
Maybe that is not a font? I don’t know.
Or s/he is making apps that make special character for users
there is a font like it exactly, what ever he want to do, using a font is the clean solution.
he is re-inventing the wheel by doing that task using blocks.
