Hi!
When some large multilingual field is above another large field and the user clicks on it, it overlaps the field below. Since their color is the same, the user may click on the first part of the second field to enter a value for the second language of the first field (see the screenshot below).
It may sound weird, but even quite experienced users with programming skills seem to be confused in such cases, which may result in mistakes in data entry.
Some users report that when they click on the second field, the first one does not go away. So the ‘ideal’ behavior in such cases would be to “slide down” the other part of the form when some field expands.