Hi.
If i make polish language for this mod will you add it to mod?

Yes, though due to some ways I coded the mod (caused by bad coding rather than factorio limitations) make it difficult. I would recommend potentially a separate mod like ctyan did: https://mods.factorio.com/mod/fun_mode_translation_patch

Or if you can suggest just some code I can past in the data-final-fixes.lua then that also works.

Hello again.
I made a preliminary translation and during testing it turned out that a large part of the mod is still not translated into Polish. It turned out that the locale.cfg file does not contain the missing entries and they are hard-coded in lua files, which means that the only way to translate it into Polish is to release my own mod, and I am too lazy for that. I am abandoning the project for now, and you can delete this topic if you want.
Best regards, S3BA

Yes, the situation is... suboptimal. I never expected people to like the mod enough to want to create translations, honestly. At some point, the mod may get properly localised, though, so it will be a lot easier then.

Hello. I happened to come across this, so I thought I’d leave a comment.
In the translation mod I created, I modified things and added keys so that as much as possible can be translated, except for parts that are hard-coded.
If you would like to translate it into Polish, creating a mod that adds a Polish locale.cfg to my translation mod should allow you to achieve what you want.