Castilan or Castillan: How To spell?

The word Castilan is misspelled against Castillan, an adjective meaning "pertaining to Castile, in Spain."

Castillan has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings casti & an which should not be misspelled with single 'L'
Wrong Spelling:  casti-l-an 
Correct Spelling:  casti-ll-an 
Find more wrongly spelled words of Castillan to spell it well.