Unnecessary duplicates with multiple languages

[Der-K-2000]

First of all thank you for the plugin!

If you have a lot of languages it's a bit messy with this add-on, because with the following option it will fullfill EVERY slug-field, even though there is no other entry in that language.

{
  "format": "[field:name]"
}

The next issue follows, if you enter (later) a custom field (here with "name"). The plugin won't update new language version AND even with the 'clear'-Button it won't work proper.

So... probably the plugin should better convert the language-special fields, if there are fields, which are not empty. Otherwise a null would be okay.