Always paste ASCII text

I would like to always paste ascii text by default, not have to go through some dialog if the text I copied from somewhere else is in unicode or some other code. Is there a way to set that?

Click on the right arrow of Paste Icon and select unformatted text.

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Note that unformatted text is not the same as ASCII text i.e., text from only the first 256 characters. I do not believe it is possible to paste in this type of filtered manner.

I wasn’t thinking in a strict ASCII, but seems to me It’s the closer option. I don’t know if there is a font with only ASCII characters, if so could be a solution.

There is a .fon and .ttf made by some German that’s strictly ASCII, just tested in LO 4.3.3.1 on 7 Ultimate x64: http://www.apollosoft.de/ASCII/indexen.htm