Build a reference list of look-alike words that mean the same thing, and ones that don't.
One entry per line, fields separated by tabs, pipes, or commas (a spreadsheet paste works).
Two fields — word | English — adds a true cognate.
Three fields — word | looks like | actually means — adds a false friend.
Or name the type yourself as a last field: cognate or false.
Entries are added to the lists below without replacing anything.