New Filter with Source String = (Validated) Target String


I have a project in which some Untranslated target strings have bee marked as translated (validated) although they were not translated.

I want to be able to detect them and translate them before revalidating them.

For this, it seems the best way would be to define a filter that displays all strings in which "Source Text = Target Text".

I've tried to do this with the Basic Expression Filter option but I can't seem to make it work.

I'd be really grateful for a tip!