Identify duplicates data in combined columns

In a table there is Lang1 (First Language ID) and Lang2 (Second Language ID) that is repeating logically and I would like to keep one record and delete the other. I have encircled the entries in different colors. For instance RED Color The Languages set is (4 and 6) and there is another set that is (6 and 4 in reverse order). How can we consider this a repeating instance. Please help.

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