We hear this is being done by Dinas
agreed, or you can even say "we hear this is done by Dimas" which is also acceptable
Avery poorly constructed English sentence
We heard this was done by Dimas ... is better
or as sam 67858 writes
'is' isnt always necessary, and in literal translation sounds wrong. If i can literally hear something with my ears then no 'is' should be used. The use of 'is' implies someone is telling me about it and i cant actually hear it myself.
As with many sentences here ..very poor english