How does the /warp give commands works? They are mostly broken i cannot find any information how it works.

Is there anything in the official documentation that does not work or gives errors?

/warp give [-df] <player> <name>

Gives the warp of the given name to the player of the given name, if he accepts it.
Use [-f] to ignore any warp-limits of the receiving player.
Use [-d] to give the warp directly without asking for acceptation first.

Its more. How can he accept or decline it. And i edited the "warp-acceptance-conversation.want-to-accept = " message. But he still get the defaault english >> https://pastebin.com/3e138zB0

And also an other one is bugged. When i want to give an warp to myself its just say this in the chat: (lightred)give.is-owner

And in the file that line is >https://pastebin.com/3bn1pHDD
I also tried "{0}" but still the same issue.

The give.is-owner error should be fixed as of the latest devBuild.

Regarding the acceptance conversation: Your translation key is wrong, the correct one is: warp-acceptance.want-to-accept. See this file for further reference.

As a side node: I think that MyWarp's Dutch translation is relatively complete, maybe you can use (and expand) it instead of relying on your own files?