correct lang code for es and zh-cn - #1934

correct lang code for es and zh-cn#1934

ShubhamOulkar wants to merge 2 commits into

expressjs:gh-pagesexpressjs/expressjs.com:gh-pagesfrom

ShubhamOulkar:fast-track-lang-codeShubhamOulkar/expressjs.com:fast-track-lang-codeCopy head branch name to clipboard