The use of which server PLs implies the purchase of a license?

Question

Programming languages

Are there any at all?
Of course, I understand that we are in Russia, but nevertheless, if there is, then which PLs should be carefully considered regarding the license.
For example, its execution requires special paid libraries or some kind of environment.

Answer 1

The question is incorrect. The programming language itself is not licensed.
Products are licensed. For developers, this can be an IDE, server build, code review and project management systems. But they can also be found for free.
Of the paid options, I only know Adobe Flash Builder, without which it is difficult to write flash, and which you have to buy. But then again...

Answer 2

IDEs can cost a lot.

Answer 3

to 1C? :) if you take both the platform and the language. And so that the "Programming Language" would be paid, I have not seen. Toolkit yes, but whatever the language... it has to have some incredible features to pay for it.

Answer 4

language - no
DBMS - they can, other software (such as cache) - it can also,
well, all sorts of PyQT, but this is not a server one