The best way to share a language pack with others is to add it to the Family Historian Plugin Store. That way, any Family Historian user will be easily able to see it and install it. All they will have to do is open the Language Packs Dialog, click on the button, and choose 'From Family Historian Plugin Store' on the menu that appears They will then see a list of language packs, including yours, and they can select it and click to import it. Thereafter it will be available on their system as one of the available language packs.
If you have written a language pack, or even if you have adapted and significantly improved somebody else's language pack, please consider submitting it to the Family Historian plugin store. You can do so anonymously if you wish, or you can use your real name - it's up to you. Obviously if yours will be the first language pack for a given language, it will be greatly valued. But even if there are already other language packs for your language, please consider submitting yours anyway. Different language packs may have different styles or benefits. It's good for users to have a choice. A user of a given language will be able to download and install multiple language packs for the same language if they want to, and easily compare them. So there's no problem about having more than one language pack for the same language. It's also not a problem if you have created your language pack by adapting someone else's language pack - even if you previously downloaded that language pack from the plugin store. More on this below.
You will be able to make as many changes and improvements as you want to your language pack after you have submitted it to the Plugin Store, so don't assume that it has to be perfect before you submit it!
For instructions on how to submit your language pack to the Plugin Store, please see How to Submit a Language Pack to the Plugin Store.