This issue has been open for 4 years, any update on it?
Metabase doesn't provide the individual translation schema to dashboards/cards/notebooks.
Creating a separate folder, copying the dashboards and questions, and changing the titles are possible in this case, to meet the requirements that we need.
In the end, I get 2 versions of the dashboard, which isn't ideal. The worst is when I need to change something on the dashboard, I have to make all the changes twice.
A great thing would be to be able to select the language of the dashboard or to have different editing versions stored in Metabase. Then I would select the right version directly in the settings of the embedding.