PageSpeed Insights for Firefox, PageSpeed Insights for Google Chrome, and PageSpeed Insights provide results localized in the following languages:
| Language | Locale |
|---|---|
| Arabic | ar |
| Bulgarian | bg |
| Catalan | ca |
| Traditional Chinese (Taiwan) | zh-TW |
| Simplified Chinese | zh-CN |
| Croatian | hr |
| Czech | cs |
| Danish | da |
| Dutch | nl |
| English | en |
| English UK | en-GB |
| Filipino | fil |
| Finnish | fi |
| French | fr |
| German | de |
| Greek | el |
| Hebrew | iw |
| Hindi | hi |
| Hungarian | hu |
| Indonesian | id |
| Italian | it |
| Japanese | ja |
| Korean | ko |
| Latvian | lv |
| Lithuanian | lt |
| Norwegian | no |
| Polish | pl |
| Portuguese (Brazilian) | pt-BR |
| Portuguese (Portugal) | pt-PT |
| Romanian | ro |
| Russian | ru |
| Serbian | sr |
| Slovakian | sk |
| Slovenian | sl |
| Spanish | es |
| Swedish | sv |
| Thai | th |
| Turkish | tr |
| Ukrainian | uk |
| Vietnamese | vi |