Would this not be better translated by, "She and I read"?
The meaning is the same. But not the exact translation. She reads and I read gives the same message as she and I read, but both use different words
it should be 'i jump and she reads
I thought so too.
The Irish for "I jump" is Léimim.
Is Leann used both for the 3rd person singular and the third person plural?
Léann is used for all of them, except first person singular and first person plural, though it can be used for those, especially plural, in some dialects.