Hi
This seems to be a general Joomla! multi-language problem with fieldgroups and fields.Please see all the discussion in
https://github.com/joomla/joomla-cms/issues/18396It looks as if it is 'solved' but not sure if it has made any release update yet. But just seen it was apparently fixed in Joomla 3.8.3https://github.com/joomla/joomla-cms/commit/35b95f54aa95ded6393ae37576d5a10812f00f1c
In
https://github.com/joomla/joomla-cms/pull/18536Issue: An item (article in that case) tagged to ALL languages is displaying all fields tagged to specific languages.The Change is: When an item is tagged to ALL languages, only display custom fields tagged to ALL languages as well as custom fields tagged to the Active language.
From the discussion my interpretation is as below but I may have misunderstood!!
The problem seems to be about if you set some Fields or Fieldgroups with language set to All, some Fields/FieldGroups to say German and others to say Bulgarian. Then in an article whose language is Bulgarian will show those fields/fieldgroups whose language is Bulgarian AND those fields/fieldgroups whose language is All. If you show an article whose language is say French then you will only see those Fields/FieldGroups whose language is All.
It would seem to me that in Multi Language setups one would probably not use the Language setting All. Rather just use the Specific languages supported.I can see this is a challenge however as one would want the answer to be the same, but in a different language, in what is effectively the same field. That is if we had Field called Colour in engish that had a value of Red, then the corresponding French field called Couleur would need a value Rouge.
Which one is shown depends on the Active language.
ColinPS may the {en-GB} and so on could be used???