In general, No, common names should not be invented for iNat. There are a fair amount of other threads that discuss this and some of the issues. An example is:
https://forum.inaturalist.org/t/common-names-invented-on-inat/27452
That said, I think purely descriptive names that just create a group of existing names that are in usage are ok. The examples from the curator guide are like this
and I think that one of your proposed examples would fall under this:
This seems like it would be acceptable, though happy to hear other opinions.
I would not recommend a straight translation of
if it isn’t already in usage, but some other users might have good counterpositions.