The <meta> element can be used to describe page contents, to facilitate for search engines.
By specifying language, the precision can be hightened even further.
<meta name="keywords" lang="en-us"
content="job ads, Bangkok">
<meta name="keywords" lang="en-GB"
content="work opportunities, Bangkok">
<meta name="keywords" lang="es"
content="oportunidades del trabajo , Bangkok">