FLan-UL2 : the UL2 model finetuned using the "Flan" prompt tuning and dataset collection.

UMT5: UmT5 is a multilingual T5 model trained on an improved and refreshed mC4 multilingual corpus,  29 trillion characters across 107 language, using a new sampling method, UniMax. Refer to
 the documentation of mT5 which can be found here.