Translation:The refrigerators are full of fruits and vegetables.
If a word, in this case "Fridges" is accepted on one question for Frigiderele it should be accepted on all questions involving the same word!
What's the difference between ”pline de“ and ”pline cu“? Are both accepted and interchangeable?
Yes, when you fill something up with something.
However, "plin / plină / plini / pline de" may also imply something or someone is dirty with something: "Sunt plin de praf" - "I'm all dusty".
The above variations are for: masculine or neutral singular, feminine singular, masculine plural and feminine or neutral plural, respectively.