Google added new link element for sites have subdomians for different geo-located regions.
it shoul be added to header of the site
[link rel="alternate" hreflang="xx" href="http://xx.example.com/" /]
where xx is 2 letter of the language.
just change [ to < and ] to >
I ctreated table with xx-value of most known and usable languages.
| Language name | ISO 639-1 |
| Armenian | hy |
| Belarusian | be |
| Bosnian | bs |
| Breton | br |
| Bulgarian | bg |
| Catalan; Valencian | ca |
| Chinese | zh |
| Croatian | hr |
| Czech | cs |
| Danish | da |
| Dutch | nl |
| English | en |
| Estonian | et |
| Finnish | fi |
| French | fr |
| Georgian | ka |
| German | de |
| Greek, Modern | el |
| Hebrew (modern) | he |
| Hindi | hi |
| Hungarian | hu |
| Indonesian | id |
| Irish | ga |
| Italian | it |
| Japanese | ja |
| Korean | ko |
| Latin | la |
| Luxembourgish | lb |
| Lithuanian | lt |
| Latvian | lv |
| Macedonian | mk |
| Mongolian | mn |
| Norwegian Bokmål | nb |
| Norwegian Nynorsk | nn |
| Norwegian | no |
| Persian | fa |
| Polish | pl |
| Portuguese | pt |
| Romanian, Moldavian, Moldovan | ro |
| Russian | ru |
| Serbian | sr |
| Scottish Gaelic; Gaelic | gd |
| Slovak | sk |
| Slovene | sl |
| Spanish; Castilian | es |
| Swedish | sv |
| Turkish | tr |
| Ukrainian | uk |
| Vietnamese | vi |
| Welsh | cy |
| Yiddish | yi |
Category: Google, Programming Feauters