I have seen words which are spelled either with a "z" or with a "s" like "optimizer" and " optimiser". I thought that the ones with "z" are wrong but on searching the web I found that both are correct. Why so? Is there any difference in the use also?
Learn English – “Optimiser” vs “optimizer”
spellingtransatlantic-differencesusage
Best Answer
"-ize" is the common AmE suffix, while in BrE "-ise" is more commonly used:
-ize:
(Etymonline)
optimise vs optimize usages in AmE vs BrE.