When a ' program does not have Free Software, it is not because its author
wants to control you.
Yes, it is.
It is just because nobody worked on it.
Choosing a free software license does not require more work than choosing a
proprietary software license.
Instead you want to force the author to write a Free Software (what is not
even always possible: ')
It is always possible. Proprietary software could be illegal (it harms our
freedoms)... but we are not there yet.
I accept to discuss about the different between simply features and liberty
features.
Freedom is not a feature.
I understand and remark the different between 'easy of use' and 'freedom of
use'
Why would it be different for the command line interface?!
When exist people blind (for example), talking about OS, without some
features it can not be achieved any freedom.
The user cannot use a free software program if it is inaccessible. But that
does not mean the program (or its developers) controls the users.
Accessibility is a feature. A required feature for many users but a feature
anyway. Not a freedom.
But now, from my point of view, an easy way to brute-translate it, at least,
must be able to incorporate (like OS installation).
Sorry I cannot make sense of this sentence. It is a language I do not
understand. But you have not denied my freedoms because you wrote in a
language I do not understand. i18n is a feature.
Proprietary Software is written in a 'different' language that programmers
don't understand, right?
Wrong. Any programming language can be used to write any software, free or
proprietary. If the language is compiled (such as C), then a binary (that
corresponds to the source code) is created and is not human-readable. The
binary can be free or proprietary. Now, if the binary is free, that means the
corresponding source code is distributed to the users (freedom 1 or 3 require
that). If the binary is proprietary the source code is (typically) not
distributed to the users, who therefore are helpless. But, you see, the
difference is not technical. At all.