The TA who ran my field ecology class told us that when we saw a plant we didn't recognize, it was important to make up a name for it, and use that name until we look up what it's called. After that you can use the official name or your own name or whatever, the important thing is to always have a name for it, even before you know the official name
Yard weeds I know official names of – dandelions, false dandelions, blackberry, tree of heaven
Yard weeds I know by names I coined – purple tab false mushrooms, satellites, waxburgers, sharpleaf, horsecotton, hexapods, lesser shitvine, greater shitvine, vector plant, axolotl gills, velvetfold, spider grass, crack fern