**Steps to replicate the issue** (include links if applicable):There are two different user behaviors that can lead to this issue:
* see https://de.wikipedia.org/w/index.php?title=Die_Erben_der_Nacht&diff=prev&oldid=245372995# Behavior 1: “I trust the system” - User trust system but MT suggests a title that already exists for something else
* alternative: https://de.wikipedia.org/w/index.php?title=Heidelbeeren&curid=2239&diff=245211216&oldid=232338871
**What happens?**:
* lead section of translated page is inserted at the end of the article# Behavior 2: “I know better” - Use changes the. title to something they think is better but user doesn’t know what already exists
* dummy value `__LEAD_SECTION__` isI believe we need different UX solutions
Here, we intend to used as sec a similar solution headeras the one we use for desktop translation.
**What should have happened instead?**:**Warning for already existing page on desktop**
* As the article already has a lead section, translation of the english lead section and inserting it to the german article should not have been possible at all.{F65696832 size=full}