I know or know the spelling
In this regard, new and old spellings were obtained
To know or know the correct spelling is what we are dealing with in this articleAccording to the new spelling, conventions should know and know each other well. The spelling you need to know corresponds to the state of the old spelling. Other conventions, such as"knowing or not knowing correctly".
This section is part of our Italian sector
Conclusion: the conventions of knowledge and knowledge of new spelling are correct. All other conventions are wrong and should no longer be used.